Can anyone give me the answers of the image???

Can Anyone Give Me The Answers Of The Image???

Answers

Answer 1

Ans 1  = 2 fe +3 cl2 = 2 fecl3

blank 1 = 2

blank 2 = 3

blank 3 = 2

Ans.2 = 4fe +3 o2 = 2fe2o3

blank 1 = 4

blank 2 = 3

blank 3 = 2

Ans.3 = c6h6o3 +H2o = 2c2h3

blank 1 = 1

blank 2 = 1

blank 3 = 2


Related Questions

Heterocyclic aromatic compounds undergo electrophilic aromatic substitution in a similar fashion to that undergone by benzene with the formation of a resonance-stabilized intermediate.

Answers

That statement "Heterocyclic aromatic compounds undergo electrophilic aromatic substitution in a similar fashion to that undergone by benzene with the formation of a resonance-stabilized intermediate." is generally true.

Heterocyclic aromatic compounds, like benzene, contain a ring of atoms with alternating double bonds (pi bonds) and exhibit delocalized pi electrons that are responsible for their aromaticity.

Electrophilic aromatic substitution is a common reaction for these types of compounds, where an electrophile is attracted to the electron-rich ring and substitutes for one of the hydrogen atoms.

The resulting intermediate is a resonance-stabilized carbocation, just like in the case of benzene.

However, the reactivity and selectivity of heterocyclic aromatic compounds may differ from that of benzene due to differences in the electronic properties of the heteroatom(s) in the ring and their effect on the ring's electron density.

To know more about Heterocyclic aromatic compounds refer to-

https://brainly.com/question/30492442

#SPJ11

CH4 (g) + O2 (g) → H2O (l) + CO2 (g)

This is an example of:

A. Synthesis

B. Combustion

C. Double replacement

D. Decomposition

Answers

Answer:

B. Combustion.

Explanation:

Looking at the given equation, we can see that methane (CH4) reacts with oxygen (O2) and releases water (H2O) and carbon dioxide (CO2). This matches the definition of a combustion reaction. Therefore, the answer is B. Combustion.

In a creek bed you find smooth rocks of all sizes. What could explain this?



A. A chemical change has occurred in these rocks.


B. Water has dissolved the outer layers of rocks.


C. When rocks are transported by water, abrasion occurs as they rub and bump into each other.


D. The types of rocks in streams are not as hard as other rocks

Answers

C. When rocks are transported by water, abrasion occurs as they rub and bump into each other.

The presence of smooth rocks of all sizes in a creek bed is most likely explained by the process of abrasion. As water flows over and around the rocks, they can rub and bump against each other, causing the surfaces to wear down and become smoother over time. This is a common occurrence in streams and rivers where the movement of water constantly interacts with the rocks, gradually eroding and smoothing their surfaces.

Learn more about "Creek Bed": https://brainly.com/question/13145167

#SPJ11

(copied answer from the sheet)
The iron haematite contains 70% iron by mass. We can calculate the amount of iron obtained in 1 tonne (1000kg) of haematite by:
Mass of iron )kg)= 70/100 x1000=700kg
Calculate the amount of calcium and magnesium obtained from 500kg of dolomite, which is 22% calcium and 13% magnesium by mass. Show your working

Answers

1. The mass of calcium obtained from 500 Kg of dolomite is 110 kilograms

2. The mass of magnesium obtained from 500 Kg of dolomite is  65 kilograms

How do i determine the mass obtained?

The mass of calcium and magnesium in the 500 Kg of dolomite can be obtained as shown below:

1. For calcium

Percentage of calcium = 22%Mass of dolomite = 500 kilogramsMass of calcium =?

Mass of calcium = Percentage of calcium × Mass of dolomite

Mass of calcium = 22% × 500

Mass of calcium = (22/100) × 500

Mass of calcium = 110 kilograms

2. For magnesium

Percentage of magnesium = 13%Mass of dolomite = 500 kilogramsMass of magnesium =?

Mass of magnesium = Percentage of magnesium × Mass of dolomite

Mass of magnesium = 13% × 500

Mass of magnesium = (13/100) × 500

Mass of magnesium = 65 kilograms

Learn more about mass composition:

https://brainly.com/question/28759819

#SPJ1

Help what’s the answer?

Answers

The computation in the question results in the production of 21 g of NF3.

The limiting reactant determines the product in what way?

Because it is the reactant that is totally consumed during the reaction, the limiting reactant specifies the maximum amount of product that can be created in a chemical process.

F2 molecular weight is 16.5 g/38 g/mol.

= 0.43 moles

N2 molecular weight is 16.5 g/28 g/mol.

= 0.59 moles

Now;

If 3 moles of F2 and 1 mole of N2 react,

N2 interacts with 0.59 moles at 0.59 * 3/1.

= 1.77 moles of F2

Thus F2 is the limiting reactant

2 moles of NF3 are created from 3 moles of F2.

When using 0.43 moles of F2, you get 0.43 * 2/3.

= 0.29 moles

NF3 mass generated is 0.29 moles * 71 g/mol.

= 21 g

Learn more about limiting reactant:brainly.com/question/14225536

#SPJ1

Compound t is a white crystalline solid.


naoh ca)


a neat


when a sample of t was mixed with aqueous sodium hydroxide and heated, a pungent smelling


gas was produced which turned damp red litmus paper blue. this same gas produced dense


white smoke with hydrogen chloride gas. hcl cg)


further testing of a solution of t with barium chloride solution produced a dense white precipitate


which did not dissolve when dilute hydrochloric acid was added to the mixture.


wh3


nh₃ + ball → nh y cut ba


what is the identity of compound t?


a


ammonium carbonate


b ammonium sulfate


csodium carbonate


d


sodium sulfate

Answers

The compounds A, B and C are ammonium chloride, ammonia gas and silver chloride respectively.

Ammonium chloride,  is a white crystalline solid which is soluble in water. On heating with sodium hydroxide it will produce ammonia gas, which is a colorless gas and has a odor or pungent smell.

So,  Ammonia gas will turn red litmus into blue as it's pH is 11.6.

When Ammonium chloride reacts with silver nitrate  in  presence of dilute Nitric acid ,  it produces Silver chloride and Ammonium nitrate

AgCl is soluble in Ammonia because it can form complexes which

makes it behave like an ion, making it soluble.

Therefore, Compound A is Ammonium chloride,

B is ammonia gas

and C is Silver chloride.

To know more about crystalline solid here

https://brainly.com/question/28287375

#SPJ4

The complete question is

A white solid A when heated with sodium hydroxide solution gives a pungent gas B which turns red litmus paper blue. The solid when dissolved in dilute nitric acid is treated with Silver nitrate solution to give white precipitate C, which is soluble in ammonia.

(A) What are the substance A, B, and C?

A 31. 0 mL sample of 0. 624M perchloric acid is titrated with a 0. 258M sodium hydroxide solution.


What is the (H+) molarity after the addition of 15. 0 mL of KOH?

Answers

A 31. 0 mL sample of 0. 624M perchloric acid is titrated with a 0. 258M sodium hydroxide solution. The molarity of H⁺ after the addition of 15.0 mL of NaOH is 0.204 M.

To find the molarity of (H⁺) after the addition of 15.0 mL of NaOH, we first need to calculate the number of moles of NaOH added:

moles of NaOH = Molarity of NaOH x Volume of NaOH

moles of NaOH = 0.258 M x 0.0150 L

moles of NaOH = 0.00387 mol

Since the balanced chemical equation for the reaction between HClO₄ and NaOH is:

HClO₄(aq) + NaOH(aq) → NaClO₄(aq) + H₂O(l)

We can see that one mole of HClO₄ reacts with one mole of NaOH. Therefore, the number of moles of HClO₄ that reacted with the NaOH is also 0.00387 mol.

To calculate the new molarity of H⁺ after the addition of NaOH, we need to use the volume of HClO₄ that remains after the reaction:

Volume of HClO₄ = 31.0 mL - 15.0 mL

Volume of HClO₄ = 16.0 mL = 0.0160 L

Now we can calculate the new molarity of H⁺:

Molarity of H⁺ = moles of HClO₄ / volume of HClO₄

Molarity of H⁺ = 0.00387 mol / 0.0160 L

Molarity of H⁺ = 0.242 M

Therefore, the molarity of (H⁺) after the addition of 15.0 mL of NaOH is 0.242 M.

To know more about the molarity refer here :

https://brainly.com/question/22997914#

#SPJ11

Write structures for the carbonyl electrophile and enolate nucleophile that react to give the aldol below.

Answers

According to the question the enolate nucleophile and carbonyl electrophiles are attached in the images below.

What is nucleophile?

A nucleophile is a species (atom, molecule, or ion) that donates an electron pair to form a new covalent bond in a reaction. Nucleophiles are attracted to electron-deficient or positively-charged sites, such as the electrophilic sites of organic molecules or cations. In organic chemistry, nucleophiles are typically Lewis bases, such as amines or other electron-rich molecules. In inorganic chemistry, nucleophiles include anions and neutral molecules containing lone pairs of electrons. In chemical reactions, nucleophiles interact with electrophiles, which are positively-charged species.

To learn more about nucleophile

https://brainly.com/question/14052597

#SPJ4

Complete Question:

_____KOH (aq) + ____H3PO4 (aq) → ___K3PO4 (aq) + __H2O (l)

To balance the equation, which formula(s) should have a coefficient of 1?

A. KOH

B. K3PO4

C. H3PO4

D. Both H3PO4 and K3PO4

Answers

3KOH(aq) +H₃PO₄(aq) → K₃PO₄(aq) +3H₂O (l)  ; A.) KOH should have a coefficient of 1.

Which formula should have coefficient of 1 to balance the equation?

To balance the equation, KOH should have a coefficient of 1.

Here, there is 1 potassium (K) atom, 1 phosphorus (P) atom, and 4 oxygen (O) atoms on each side of the equation.

To balance the equation, start by placing coefficient of 3 in front of KOH and coefficient of 1 in front of H₃PO₄ ;

This balances number of potassium and phosphorus atoms, but there are now 9 oxygen atoms on left side and 6 on right side. To balance the oxygen atoms, add coefficient of 3 in front of H2O.

Now the equation is balanced, and coefficients are:

3KOH(aq)+ 1H3PO4 (aq) → 1K3PO4 (aq) +3H2O (l)

Therefore, only A. KOH should have a coefficient of 1.

To know more about balanced equations, refer

https://brainly.com/question/11904811

#SPJ1

a solution of the weak acid ha ha is prepared by dissolving 2.70 g 2.70 g of ha ha in 100.0 ml 100.0 ml water. the solution is titrated, and the equivalence point is reached after 32.1 ml 32.1 ml of 0.500 m naoh 0.500 m naoh is dispensed. calculate the molar mass of ha.

Answers

The molar mass of HA is approximately 168.48 g/mol.

To calculate the molar mass of HA, we need to use the balanced chemical equation for the reaction between HA and NaOH:

[tex]HA + NaOH[/tex] → [tex]NaA + H2O[/tex]

From the equation, we can see that 1 mole of HA reacts with 1 mole of NaOH to produce 1 mole of NaA. At the equivalence point of the titration,

[tex]moles of NaOH = (0.500 mol/L) * (0.0321 L) = 0.01605 mol[/tex]

Since the initial solution was prepared by dissolving 2.70 g of HA in 100.0 ml of water, we can calculate the initial concentration of HA in units of moles per liter:

[tex]moles\ of HA = (2.70 g / molar\ mass\ of HA) = (0.0270 kg / molar\ mass\ of HA)[/tex]

[tex]initial\ concentration\ of\ HA = moles\ of\ HA / (0.100 L) = moles\ of\ HA / 1000 mL[/tex]

Setting the moles of NaOH equal to the moles of HA, we can solve for the molar mass of HA:

moles of NaOH = moles of HA

[tex]0.01605\ mol = (0.0270 kg / molar\ mass\ of HA) / 0.100 L[/tex]

[tex]molar\ mass\ of\ HA = (0.0270 kg / 0.01605 mol) / 0.100 L = 168.48 g/mol[/tex]

To know more about molar mass, here

brainly.com/question/22997914

#SPJ4

Find the number of grams of zinc (Zn) metal that will completely react with 730


grams of hydrochloric acid (HCl) to produce zinc chloride (ZnCl2) and hydrogen gas


(H2).



Write the balanced chemical equation.


Use coefficients from balanced equation to determine mole ratio

Answers

654 grams of Zn metal will completely react with 730 grams of HCl


The balanced chemical equation for this reaction is:
Zn + 2HCl → ZnCl2 + H2

From the equation, we can see that for every 1 mole of Zn, 2 moles of HCl are required for a complete reaction. This means the mole ratio of Zn to HCl is 1:2.

To determine the number of moles of HCl used, we need to convert the given mass of HCl to moles. The molar mass of HCl is 36.5 g/mol, so:

730 g HCl x (1 mol HCl/36.5 g HCl) = 20 moles HCl

Using the mole ratio from the balanced equation, we can determine the number of moles of Zn required:

20 moles HCl x (1 mol Zn/2 mol HCl) = 10 moles Zn

Finally, we can convert the number of moles of Zn to grams using its molar mass of 65.4 g/mol:

10 moles Zn x (65.4 g Zn/mol) = 654 grams of Zn

Therefore, 654 grams of Zn metal will completely react with 730 grams of HCl to produce ZnCl2 and H2.

To know more about Balanced Equation:

https://brainly.com/question/11904811

#SPJ11

. if 3.7 moles of propane (c3hs) are at a temperature of 28°c and are under 154.2 kpa of pressure, what volume does the sample occupy?​

Answers

The volume occupied by 3.7 moles of propane at a temperature of 28°C and under 154.2 kPa of pressure is approximately 55.44 liters.

To find the volume occupied by 3.7 moles of propane (C3H8) at a temperature of 28°C and under 154.2 kPa of pressure, we will use the Ideal Gas Law, which is given by the equation:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin.

First, we need to convert the temperature from Celsius to Kelvin:
T = 28°C + 273.15 = 301.15 K

Next, we will use the ideal gas constant in the appropriate units (since the pressure is given in kPa):
R = 8.314 J/(mol·K) = 8.314 kPa·L/(mol·K)

Now we can rearrange the Ideal Gas Law equation to solve for the volume (V):

V = nRT / P

Substitute the known values into the equation:

V = (3.7 moles) × (8.314 kPa·L/(mol·K)) × (301.15 K) / (154.2 kPa)

V ≈ 55.44 L

So, the volume occupied by 3.7 moles of propane at a temperature of 28°C and under 154.2 kPa of pressure is approximately 55.44 liters.

To know more about propane, visit:

https://brainly.com/question/25008296#

#SPJ11

If the reaction above had 110.88g of CS2 and 3.12 mol of NaOH determine the mass (in grams) produced of Na2CS3 in the reaction.
3CS2+6NaOH—>2Na2CS3+NaOH+3H2O
Answer Asap pls

Answers

186.48 g of [tex]Na_2CS_3[/tex] were generated throughout the reaction.

The balanced chemical equation is:

[tex]3CS_2[/tex] + 6NaOH → [tex]2Na_2CS_3[/tex] + NaOH + [tex]3H_2O[/tex]

The molar mass of [tex]CS_2[/tex] is 76.14 g/mol, and the molar mass of [tex]2Na_2CS_3[/tex] is 192.23 g/mol.

To find the limiting reactant, we need to calculate the number of moles of each reactant. Using the given mass of [tex]CS_2[/tex]:

110.88 g [tex]CS_2[/tex] / 76.14 g/mol = 1.456 mol [tex]CS_2[/tex]

Using the given number of moles of [tex]NaOH[/tex]:

3.12 mol [tex]NaOH[/tex]

We can see that [tex]CS_2[/tex] is the limiting reactant, since it has fewer moles than [tex]NaOH[/tex]. Therefore, we will use the amount of [tex]CS_2[/tex] to calculate the amount of [tex]Na_2CS_3[/tex] produced.

From the balanced equation, we can see that 3 mol of [tex]CS_2[/tex] produces 2 mol of [tex]Na_2CS_3[/tex]. So, 1.456 mol of [tex]CS_2[/tex] will produce:

(2 mol [tex]Na_2CS_3[/tex] / 3 mol [tex]CS_2[/tex]) * 1.456 mol [tex]CS_2[/tex] = 0.971 mol [tex]Na_2CS_3[/tex]

Now, we can use the molar mass of [tex]Na_2CS_3[/tex] to calculate the mass produced:

0.971 mol [tex]Na_2CS_3[/tex] * 192.23 g/mol = 186.48 g [tex]Na_2CS_3[/tex]

Therefore, the mass of [tex]Na_2CS_3[/tex] produced in the reaction is 186.48 g.

For more such questions on reaction , click on:

https://brainly.com/question/11231920

#SPJ11

How many moles are in 3. 612x1024 atoms of Carbon?


YOU MUST SHOW YOUR WORK IN ORDER TO RECEIVE CREDIT

Answers

There are approximately 6 moles in given set of atoms.

To find the number of moles in 3.612x10^24 atoms of Carbon, you will need to use Avogadro's number, which is 6.022x10^23 atoms/mol.

1. Determine the number of atoms given: 3.612x10^24 atoms of Carbon

2. Use Avogadro's number to convert atoms to moles:
(3.612x10^24 atoms) * (1 mol / 6.022x10^23 atoms)

3. Perform the calculation:
(3.612x10^24) / (6.022x10^23) = 6 moles (approximately)

So, there are approximately 6 moles in 3.612x10^24 atoms of Carbon.

To know more about Avogadro's number:

https://brainly.com/question/1513182

#SPJ11

The temperature of CI 2 is changed from 836. 06 K to 625. 29 K. If its new volume is 14. 509 L, what was its original volume in liters?

Answers

The original volume of CI₂ was 19.33 L.

According to Charles' Law, the volume of a gas is directly proportional to its temperature at constant pressure. This can be expressed as V₁/T₁ = V₂/T₂, where V₁ and T₁ are the initial volume and temperature, and V₂ and T₂ are the final volume and temperature.

In this problem, we are given the initial temperature (T₁ = 836.06 K), final temperature (T₂ = 625.29 K), and final volume (V₂ = 14.509 L). We are asked to find the initial volume (V₁). To do this, we can rearrange the Charles' Law equation to solve for V₁:

V₁ = (V₂/T₂) x T₁

Plugging in the values, we get:

V₁ = (14.509 L/625.29 K) x 836.06 K

V₁ = 19.35 L

As a result, the initial volume of CI₂ was 19.33 L.

To know more about the Temperature, here

https://brainly.com/question/30584358

#SPJ4

Problems - Using Equation Editor SHOW all calculations!!! 1. The stannous fluoride in a 10. 00 g sample of toothpaste was extracted and then precipitated with lanthanum nitrate solution. 0. 105 g of precipitate was collected. What is the mass of SnF2 present in the toothpaste sample? What is the mass percentage of stannous fluoride in the 10. 00 g sample of toothpaste? The percentage of SnF2 listed on the box was 1. 50%. What does this say about our percent yield of the extraction/recovery process? ​

Answers

The calculation of the mass of SnF₂ present in the toothpaste sample determined it to be 0.105 g. The mass percentage of stannous fluoride in the toothpaste sample was found to be 1.05%. The percent yield of the extraction/recovery process, comparing the recovered mass of SnF₂ to the expected mass based on the percentage listed on the box, was calculated to be 70.0%. This indicates a moderate level of efficiency in the extraction/recovery process.

To solve this problem, we need to use stoichiometry and the concept of percent yield.

1. Calculation of the mass of SnF₂ present in the toothpaste sample:

Let's assume that all the SnF₂ in the toothpaste sample was extracted and precipitated.

The balanced chemical equation for the reaction between stannous fluoride and lanthanum nitrate is:

SnF₂ + 2La(NO₃)3 → La₂(SnF₆) + 6NO₃

According to the equation, 1 mole of SnF₂ reacts with 2 moles of La(NO₃)₃ to form 1 mole of La2(SnF6).

The molar mass of SnF2 is 156.69 g/mol.

Therefore, the number of moles of SnF₂ in the toothpaste sample is:

n(SnF₂) = (0.105 g)/(156.69 g/mol) = 0.0006701 mol

Since the stoichiometric ratio of SnF₂ to La₂(SnF₆) is 1:1, the number of moles of La₂(SnF₆) formed is also 0.0006701 mol.

The mass of SnF2 present in the toothpaste sample is:

m(SnF₂) = n(SnF₂) × M(SnF₂) = 0.0006701 mol × 156.69 g/mol = 0.105 g

Therefore, the mass of SnF₂ present in the toothpaste sample is 0.105 g.

2. Calculation of the mass percentage of stannous fluoride in the toothpaste sample:

The mass percentage of SnF₂ in the toothpaste sample is:

% mass = (mass of SnF₂ / mass of toothpaste sample) × 100%

The mass of the toothpaste sample is given as 10.00 g.

Therefore, the mass percentage of SnF₂ in the toothpaste sample is:

% mass = (0.105 g / 10.00 g) × 100% = 1.05%

Therefore, the mass percentage of stannous fluoride in the toothpaste sample is 1.05%.

3. Analysis of the percent yield of the extraction/recovery process:

The percentage of SnF₂ listed on the box was 1.50%.

The percent yield of the extraction/recovery process is calculated as:

% yield = (mass of SnF₂ recovered / expected mass of SnF₂) × 100%

The expected mass of SnF₂ in the toothpaste sample, based on the percentage listed on the box, is:

mass of SnF₂ expected = (1.50% / 100%) × 10.00 g = 0.150 g

Therefore, the percent yield of the extraction/recovery process is:

% yield = (0.105 g / 0.150 g) × 100% = 70.0%

This means that the efficiency of the extraction/recovery process was 70.0%, which is not very high. It could be due to various factors such as incomplete extraction or loss of SnF₂ during the precipitation process.

To know more about the stannous fluoride refer here :

https://brainly.com/question/29227059#

#SPJ11

What is the least number of electrons this atom must have in order to have a negative charge?

Answers

An atom becomes negatively charged when it gains electrons. The number of electrons an atom needs to gain to become negatively charged depends on the number of protons in its nucleus, which determines its atomic number and the number of electrons it normally has in its neutral state.

In general, if an atom gains n electrons, it will have a negative charge of -n. For example, if an oxygen atom (atomic number 8) gains two electrons, it will have a negative charge of -2.

Therefore, the least number of electrons an atom must have in order to have a negative charge would be one more than the number of protons in its nucleus, since adding one electron will give it a charge of -1. For example, if the atom has 6 protons, it would need 7 electrons to have a negative charge of -1.

This corresponds to the element carbon, which has atomic number 6 and normally has 6 electrons in its neutral state. Adding one electron to a carbon atom would give it a negative charge of -1.

The graph shows the distribution of energy in the particles of two gas samples at different temperatures, T1 and T2. A, B, and C represent individual particles. The graph shows the distribution of energy in the particles of two gas samples at different temperatures, T1 and T2. A, B, and C represent individual particles.

Answers

More gas particles participate in the reaction at T2 than at T1. Option D

How does temperature affect the energy distribution of gases?

The graphs are not shown here but I can explain the relationship between how temperature affect the energy distribution of gases.

According to the Maxwell-Boltzmann distribution, a gas's molecule energies are distributed according to temperature, and the most likely energy increases as the temperature rises.

As the temperature of a gas increases, the peak of the energy distribution shifts to higher energies, and an increase in the proportion of molecules with higher energies follows. The possibility of high-energy gas molecule collisions, which can lead to chemical reactions or other kinds of energy transfer, is increased by this.

Learn more about gases:https://brainly.com/question/19695466

#SPJ1

Missing parts;

The graph shows the distribution of energy in the particles of two gas samples at different temperatures, T1 and T2. A, B, and C represent individual particles.

Based on the graph, which of the following statements is likely to be true? (3 points)

Particle A is more likely to participate in the reaction than particle B.

Particle C is more likely to participate in the reaction than particle B.

The number of particles able to undergo a chemical reaction is less than the number that is not able to.

More gas particles participate in the reaction at T2 than at T1.

A sample of copper has a mass of 500. grams. If this sample absorbs 12 750 joules of heat,
how much will its temperature change?

Answers

The amount by which the temperature of the sample of copper will change is 66.23°C.

How to calculate change in temperature?

The change in temperature (∆T) of a substance can be calculated using the following calorimetric equation:

Q = mc∆T

Where;

Q = quantity of heat absorbed or releasedm = mass c = specific heat capacity∆T = change in temperature

According to this question, a sample of copper has a mass of 500 grams. If this sample absorbs 12750 joules of heat, the ∆T can be calculated thus;

∆T = 12750J ÷ (500g × 0.385J/g°C)

∆T = 66.23°C

Learn more about change in temperature at: https://brainly.com/question/29766819

#SPJ1

Please help!

owen has 28.5 grams of liquid benzene at 287.6 k. how much energy is released when it freezes?

Answers

When Owen has 28.5 grams of liquid benzene at a temperature of 287.6 K, a total of 3.809 kJ of energy is released during the freezing process.

To find the energy released when benzene freezes, we need to know its heat of fusion and the amount of benzene that freezes. The heat of fusion of benzene is 10.4 kJ/mol.

First, we need to determine how many moles of benzene we have:

Molar mass of benzene (C₆H₆) = 78.11 g/mol

Number of moles of benzene = 28.5 g / 78.11 g/mol = 0.3647 mol

Since the molar ratio of benzene to energy released is 1:1, the energy released when benzene freezes can be calculated as:

Energy released = moles of benzene x heat of fusion

Energy released = 0.3647 mol x 10.4 kJ/mol = 3.809 kJ

Therefore, 3.809 kJ of energy is released when the given amount of liquid benzene freezes.

To know more about the liquid benzene refer here :

https://brainly.com/question/25798187#

#SPJ11

What volume of 7.8 M copper (II) sulfate stock solution is needed to prepare 3.25 L of a 5.4 M solution?
WILL MARK BRAINLIEST

Answers

Answer:

The volume of 9.0 M copper (II) sulfate stock solution needed to prepare 3.0 L of a 5.0 M solution is 1.667 L

Explanation:

Dilution is a process by which the concentration of a solute in solution is reduced by adding more solvent.

In other words, dilution is the procedure followed to prepare a less concentrated solution from a more concentrated one, and it simply consists of adding more solvent.

In a dilution the amount of solute does not vary. What varies in a dilution is the volume of the solvent: as more solvent is added, the concentration of the solute decreases, as the volume (and weight) of the solution increases.

The equation used in this case is:

Ci * Vi = Cf * Vf

where

Ci: initial concentration

Vi: initial volume

Cf: final concentration

Vf: final volume

In this case:

Ci: 9 M

Vi: ?

Cf: 5 M

Vf: 3 L

tests show that the hydrogen ion concentration of a sample of apple juice is 0.0003 and that of ammonia is . find the ph of each liquid using the formula , where is the hydronium ion concentration.

Answers

The pH of the apple juice is approximately 3.52.

The pH of ammonia is approximately 11.13.

The pH of the apple juice can be calculated using the formula pH = -log[H₃O⁺], where [H₃O⁺] is the hydronium ion concentration. Given that the hydrogen ion concentration of the apple juice is 0.0003, the hydronium ion concentration can be calculated as follows:

[H₃O⁺] = 10^(-pH)

0.0003 = 10^(-pH)

-pH = ㏒(0.0003)

pH = -㏒(0.0003)

pH = 3.52

As a result, the pH of apple juice is roughly 3.52.

Similarly, the pH of ammonia can be calculated using the same formula. However, we are given the hydrogen ion concentration for ammonia, so we need to calculate the hydronium ion concentration first. Ammonia is a base, so it reacts with water to produce hydroxide ions (OH⁻):

NH₃ + H₂O → NH₄⁺ + OH⁻

The equilibrium constant for this reaction is the base dissociation constant, Kb. For ammonia, Kb = 1.8 x 10⁻⁵ at 25°C. Using this value, we can calculate the concentration of hydroxide ions as follows:

Kb = [NH4⁺][OH⁻]/[NH₃3

1.8 x 10⁻⁵ = x²/0.05

x = 1.34 x 10⁻³

Therefore, the concentration of hydroxide ions is 1.34 x 10⁻³ M. Using the formula for pH, we can now calculate the pH of ammonia:

pOH = -㏒[OH⁻] = -㏒(1.34 x 10⁻³) = 2.87

pH = 14 - pOH = 14 - 2.87 = 11.13

As a result, the pH of ammonia is about 11.13.

To know more about the Concentration, here

https://brainly.com/question/28113949

#SPJ4

Help what’s the answer?

Answers

This problem can be solved using Boyle's Law, which posits that the pressure of any given gas will be inversely proportional to its volume when temperature is kept as a constant.

What will be the final volume of the given methane gas ?

Mathematically Boyle's Law can be expressed as:

P₁V₁ = P₂V₂

where P₁ and V₁ are the initial pressure and volume, respectively, and P₂ and V₂ are the final pressure and volume, respectively.

We are given that:

P₁ = 1.15 atm

V₁ = 640 mL

T = 23.9 °C (which is 297.05 K, using the Kelvin temperature scale)

We need to find V₂ when P₂ = 1.43 atm.

Using Boyle's Law, we can set up the following equation:

P₁V₁ = P₂V₂

(1.15 atm)(640 mL) = (1.43 atm)(V₂)

Solving for V₂:

V₂ = (1.15 atm)(640 mL) / (1.43 atm)

V₂ = 514.69 mL

Therefore, the final volume of the methane gas is 514.69 mL when compressed at constant temperature until its pressure is 1.43 atm.

Learn more about Boyle's Law here:

https://brainly.com/question/30367133

#SPJ1

If the molal concentration in water is the same for the following substances, rank these solutions in decreasing melting point. Highest placed in the rank will have the highest melting point.


calcium phosphate, Ca3(PO4)2


glucose, c6h12o6


sodium chloride, NaCl


magnesium chloride, MgCl2

Answers

The ranking of these solutions in decreasing melting point is: calcium phosphate > magnesium chloride > sodium chloride > glucose.

To rank the solutions with the same molal concentration in decreasing order of their melting points, we need to consider their van't Hoff factor (i), which represents the number of particles a solute dissociates into when dissolved in water. The formula to calculate the effect of a solute on the melting point of a solution is ΔTf = Kf × m × i, where Kf is the cryoscopic constant of water, m is the molality, and i is the van't Hoff factor.

Here are the van't Hoff factors for each substance:

1. Calcium phosphate, Ca₃(PO₄)₂: This substance dissociates into 5 ions (3 Ca²⁺ + 2 PO₄³⁻), so i = 5.
2. Glucose, C₆H₁₂O₆: This substance is a molecular compound and does not dissociate into ions, so i = 1.
3. Sodium chloride, NaCl: This substance dissociates into 2 ions (Na⁺ + Cl⁻), so i = 2.
4. Magnesium chloride, MgCl₂: This substance dissociates into 3 ions (Mg²⁺ + 2 Cl⁻), so i = 3.

Using the van't Hoff factor, we can rank the solutions in decreasing order of their melting points:

1. Calcium phosphate, Ca₃(PO₄)₂ (i = 5)
2. Magnesium chloride, MgCl₂(i = 3)
3. Sodium chloride, NaCl (i = 2)
4. Glucose, C₆H₁₂O₆ (i = 1)

So, the ranking of these solutions in decreasing melting point is: calcium phosphate > magnesium chloride > sodium chloride > glucose.

To know more about van't Hoff factors :

https://brainly.com/question/30905748

#SPJ11

Which of the following is a product in the chemical equation?

2Al(s) + 6HCl(aq) → 2AlCl3(aq) + 3H2(g)

A. HCl

B. Both AlCl3 and Al are products.

C. H2

D. Al

Answers

Answer:

B

Explanation:

harber process of manufacturing ammonia​

Answers

The Haber process involves the following steps:

Preparation of reactants; Compression of gases; Mixing of gases; Reaction; Separation of ammonia; Separation of ammonia

The Haber process is a method used to manufacture ammonia (NH3) from nitrogen gas (N2) and hydrogen gas (H2). The process is named after its inventor, German chemist Fritz Haber, who developed the process in the early 20th century.

The Haber process involves the following steps

Preparation of reactants: Nitrogen gas and hydrogen gas are prepared in pure form. Nitrogen is obtained from the air through the process of fractional distillation, while hydrogen is obtained from natural gas or other sources.Compression of gases: The nitrogen and hydrogen gases are compressed separately to increase their pressure. The high pressure helps to force the gases to react.Mixing of gases: The compressed nitrogen and hydrogen gases are mixed together in a ratio of 1:3, which is the stoichiometric ratio for the production of ammonia.Reaction: The mixed gases are then passed over an iron catalyst at a temperature of around 450-500°C and a pressure of around 200-250 atmospheres. This causes the nitrogen and hydrogen to react, forming ammonia.Separation of ammonia: The ammonia produced in the reaction is then cooled and condensed into a liquid form. The liquid ammonia is separated from any unreacted nitrogen or hydrogen gases and purified.

The Haber process is an important industrial process for the production of ammonia, which is a vital ingredient in the production of fertilizers and many other chemical compounds.

For more question on Haber process click on

https://brainly.com/question/21867752

#SPJ11

The normal boiling point of water is 100. 0 °c and its molar enthalpy of vaporization is 40. 67 kj/mol. What is the change in entropy in the system in j/k when 39. 3 grams of steam at 1 atm condenses to a liquid at the normal boiling point?.

Answers

The change in entropy in the system when 39.3 grams of steam at 1 atm condenses to a liquid at the normal boiling point is 237.4 J/K.

The normal boiling point of a substance is the temperature at which its vapor pressure equals the pressure of the surroundings. In the case of water, the normal boiling point is 100.0 °C at a pressure of 1 atm.

The molar enthalpy of vaporization is the amount of energy required to convert one mole of a liquid into a gas at a constant temperature and pressure. For water, this value is 40.67 kJ/mol.

To determine the change in entropy when 39.3 grams of steam at 1 atm condenses to a liquid at the normal boiling point, we can use the equation ΔS = q/T, where ΔS is the change in entropy, q is the heat transferred, and T is the temperature.

In this case, the heat transferred is equal to the molar enthalpy of vaporization multiplied by the number of moles of water condensed, which is equal to the mass of steam divided by the molar mass of water.

First, we need to convert the mass of steam to moles. The molar mass of water is 18.015 g/mol, so 39.3 g of steam is equal to 39.3/18.015 = 2.183 mol of water.

Next, we can calculate the heat transferred using the molar enthalpy of vaporization:

q = ΔHvap × n = 40.67 kJ/mol × 2.183 mol = 88.76 kJ

Finally, we can calculate the change in entropy:

ΔS = q/T = 88.76 kJ / (373.15 K) = 237.4 J/K

Therefore, the change in entropy in the system when 39.3 grams of steam at 1 atm condenses to a liquid at the normal boiling point is 237.4 J/K.

To know more about entropy, visit:

https://brainly.com/question/13135498#

#SPJ11

The local atmospheric pressure is 392 mm of Hg. What is the pressure in kpa? Your answer should not include units; simply type in the correct number for the pressure in kilopascals. Be sure to follow significant digit rules!

Answers

To convert the local atmospheric pressure from mm of Hg to kPa, follow these steps:

1. Calculate the conversion of mm of Hg to atm:
  1 atm = 760 mm of Hg
  392 mm Hg × (1 atm / 760 mm Hg) = 0.5158 atm

2. Convert atmospheres to kilopascals (kPa):
  1 atm = 101.325 kPa
  0.5158 atm × (101.325 kPa / 1 atm) = 52.24 kPa

Following significant digit rules, the pressure in kilopascals is 52.2 kPa.

What is atmospheric pressure?

Atmospheric pressure is the force exerted by the weight of the Earth's atmosphere on a unit of area at a given point on the Earth's surface. The atmosphere is composed of gases, mainly nitrogen (78%) and oxygen (21%), and other trace gases such as argon, carbon dioxide, neon, and helium. These gases are held near the Earth's surface by the force of gravity, and they exert a pressure on the surface below.

Atmospheric pressure is usually measured in units of millibars (mb) or inches of mercury (inHg), and it varies depending on factors such as altitude, temperature, and weather conditions. At sea level, the standard atmospheric pressure is around 1013 mb or 29.92 inHg, but it decreases as you go higher in altitude, because there is less air above you to exert pressure.

Changes in atmospheric pressure can have a significant impact on weather patterns, and can cause changes in temperature, wind patterns, and precipitation. Weather forecasters often use changes in atmospheric pressure as a key indicator in predicting weather patterns.

To know more about Atmospheric pressure:

https://brainly.com/question/28310375

SPJ11

CAN someone please help me with this please?

Answers

The mass of I2 reacted is  142.2 g

The mass of PCl3 reacted is 153.4 g

What is the stoichiometry?

Stoichiometry is a fundamental concept in chemistry and is used in many different areas of science and industry.

We know that;

Number of moles of the F2 produced = 21.1 g/38 g/mol

= 0.56 moles

If 1 mole of I2 produced 1 mole of F2

Then 0.56 moles of I2 reacted

Mass of the I2 reacted = 0.56 mol * 254 g/mol

= 142.2 g

Number of moles of PCl5 = 234.1 g/208 g/mol

= 1.12 moles

If the reaction is 1:1:1

Mass of the PCl3 reacted = 1.12 moles * 137 g/mol

= 153.4 g

Learn more about stoichiometry:https://brainly.com/question/30215297

#SPJ1

Calculate the cell potential for the following unbalanced reaction that takes place in an electrochemical cell at 25 °C when [Mg2+] = 0. 000612 M and [Fe3+] = 1. 29 M



Mg(s) + Fe3+ (aq) = Mg2+ (aq) + Fe(s)



E°(Mg2+/Mg) = -2. 37 V and E°(Fe3+/Fe) = -0. 036 V

Answers

The cell potential for the given reaction at 25°C is -2.3895 V.

First, we need to balance the equation;

Mg(s) + Fe³⁺(aq) → Mg²⁺(aq) + Fe(s)

Next, we can use the Nernst equation to calculate the cell potential (Ecell) at 25°C;

Ecell = E°cell - (RT/nF)ln(Q)

where; E°cell is the standard cell potential

R is the gas constant (8.314 J/mol·K)

T is the temperature in Kelvin (298 K)

n is number of electrons transferred in balanced reaction

F is the Faraday constant (96,485 C/mol)

Q is the reaction quotient

Since the reaction is not balanced in terms of electrons transferred, we need to balance it and determine the number of electrons transferred:

Mg(s) + Fe³⁺(aq) → Mg²⁺(aq) + Fe(s) + 2e⁻

n = 2

The reaction quotient (Q) will be calculated using concentrations of the reactants and products;

Q = [Mg²⁺][Fe(s)] / [Mg(s)][Fe³⁺]

Substituting the given values, we get;

Q = (0.000612 M)(1) / (1)(1.29 M)

Q = 0.000474

Now, we can calculate the cell potential (Ecell) using the Nernst equation;

Ecell = E°cell - (RT/nF)ln(Q)

= (-2.37 V) - (0.0257 V)log10(0.000474)

= -2.37 V - 0.0195 V

= -2.3895 V

Therefore, the cell potential is -2.3895 V.

To know more about cell potential here

https://brainly.com/question/1313684

#SPJ4

Other Questions
Kimberly rolls two six-sided number cubes numbered 1 through 6 and adds up the two numbers construct a tree diagram to determine all the possible outcomes list the sum at the end of each branch of the tree MODELING REAL LIFE About 5.2% of a population contracted the flu last year. A test used to diagnose the flu was 92% accurate for people who had the flu and 85% accurate for people who did not have it. Find and interpret the ratio of true positives to false positives. Which do you think had a more powerful impact on the audience: the speakers knowledge of the rhetorical situation (SPACE) or his careful use of rhetorical strategies (CAT)? Why do you think that? Sheffield Corp. Closes its books on its July 31 year-end. The company does not make entries to accrue for interest except at its year-end. On June 30, the Notes Receivable account balance is $22,000. Notes Receivable include the following. Date Maker Face Value Term Maturity Date Interest RateApril 21 Booth Inc. $6,000 90 days July 20 8%May 25 Manning Co. 7,800 60 days July 24 10%June 30 ANF Corp. 10,000 6 months December 31 6%During July, the following transactions were completed. July 5 Made sales of $4,140 on Sheffield Corp. Credit cards. 14 Made sales of $400 on Visa credit cards. The credit card service charge is 3%. 20 Received payment in full from Coote Inc. On the amount due. 24 Received payment in full from Brady Co. On the amount due. Required:Journalize the July transactions and the July 31 adjusting entry for accrued interest receivable. (Interest is computed using 360 days; omit cost of goods sold entries. ) As an object moves from point a to point b only two forces act on it: one force is nonconservative and does 30 j of work, the other force is conservative and does +50 j of work. between a and b, Evaluate the following indefinite integral (1 / 2 +e^x + e^-x ) dx NatePhones is a leading manufacturer of smartphones. The company announces the launch of its new product by the end of 2018. This leads to conflict between the company's marketing and production teams. The production team argues that the new product cannot be completed by the end of 2018, while the marketing team argues that the launch of the new product after 2018 will minimize the company's competitive advantage. In this scenario, the structural factor for conflict among the two teams is _____ Please help..... describe the transformation from the quadratic parent function f(x)=x^2 6. The third cartoon says that allowing women to vote will "clean up" politics. Why do you thinkwomen made that claim? QuestionSelect the correct answer from each drop-down menu. Nick bought apples at a farmers market where 5 apples cost $4. 45. If Nick bought 7 apples, he paid $. If Nick paid $9. 79 for some apples, he bought apples. Find the range and mean of each data set. Use your results to compare the two data sets.Set A:1 10 7 17 20Set B:10 17 16 18 12 Read this Knowledge Article about the common themes in The Crucible alluding to the Salem witch trials and the McCarthy hearings and their connection to the events in the play. Then, select any theme from the play and write two to three paragraphs analyzing how the theme is developed through the text Simplify (7/2 x 5/3) + (1/6 x 3/2) - (12/8 x 4/3)Give proper step by step explanation Which concept is related to increasing a game's virality? O balanced difficulty online high score tables O limited lives O realistic physics Andrew Jackson saw his election to the presidency as a victory forA. Business ownersB. The common manC. BankersD. Wealthy plantation owners 2. a. Marisa / venir / a / clase P las ocho b. Y t? A qu hora vienes a clase?a.b.3. a. Ellie y Juan / querer / hacer ejercicio / en el gimnasio b. Dnde quieres hacer ejercicio t?a.b.4. a. Nosotras / tener / un amigo / muy travieso b. Y t? Tienes un amigo travieso?a.b.54 Cuaderno de gramticaVen conmigo! Level 1, Chapter 7HRW material copyrighted under notice appearing earlier in this work. A dart has a circumference of 26\pi(pi symbol)calculate the total area on which the dart may land Gary has a brother and a sister in college. He traveled 2 x 10^3 miles to visit his sister. He traveled 4. 2 x 10^5 miles to visit his brother. The distance Gary traveled to visit his brother is how many times as much as the distance Gary traveled to visit his sister? Scientists want to order the prey found in the flounder stomachs by percent weight. Of the six types of prey found in the stomachs, based on Table 1, which prey would be the third largest? A. Hydrozoa B. Polychaeta C. Crustacea D. Mollusca List 5 or more steps in how Greg created these rural schools in ( three cups of tea)