What is the rate of change of total pressure in the vessel during the reaction?.

Answers

Answer 1

The rate of change of total pressure in a vessel during a reaction depends on the stoichiometry of the reaction and the behavior of the reactants and products with respect to pressure.

In general, if the reaction involves the production or consumption of gases, the total pressure in the vessel will change as the reaction proceeds. The rate of change of total pressure can be calculated using the ideal gas law, which relates the pressure, volume, and temperature of a gas:

PV = nRT

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

If the number of moles of gas changes during the reaction, the pressure will change accordingly. The rate of change of pressure can be calculated using the following equation:

ΔP/Δt = (Δn/Δt)RT/V

where ΔP/Δt is the rate of change of pressure, Δn/Δt is the rate of change of the number of moles of gas, R is the ideal gas constant, T is the temperature, and V is the volume.

Therefore, to determine the rate of change of total pressure in a vessel during a reaction, it is necessary to know the stoichiometry of the reaction and the behavior of the reactants and products with respect to pressure.

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Related Questions

A 72. 4 mL solution of Cu(OH) is neutralized by 47. 8 mL of a 0. 56 M H2(C204) solution. What is the concentration of the Cu(OH)?​

Answers

The concentration of Cu(OH) is 0.185 M.

To find the concentration of Cu(OH), we need to use the balanced chemical equation for the neutralization reaction:
Cu(OH)₂ + 2 H₂(C₂₀₄)  → Cu(C₂₀₄) )₂ + 4H2O

From the equation, we can see that 2 moles of  H₂(C₂₀₄)  react with 1 mole of Cu(OH)₂.

Therefore, we can use the following equation to calculate the moles of Cu(OH)₂:
moles of Cu(OH)₂ = moles of  H₂(C₂₀₄) / 2

To find the moles of  H₂(C₂₀₄) , we can use the concentration and volume of the H₂(C₂₀₄)  solution:
moles of  H₂(C₂₀₄)  = concentration of  H₂(C₂₀₄)  x volume of  H₂(C₂₀₄)  (in liters)

We need to convert the volume of the  H₂(C₂₀₄)  solution from milliliters to liters:
volume of  H₂(C₂₀₄)  = 47.8 mL = 0.0478 L

Substituting the given values, we get:
moles of H₂(C₂₀₄) = 0.56 M x 0.0478 L = 0.026768 moles

Now we can calculate the moles of Cu(OH)₂:
moles of Cu(OH)₂ = 0.026768 moles / 2 = 0.013384 moles

To find the concentration of Cu(OH), we need to divide the moles of Cu(OH)₂ by the volume of the Cu(OH) solution in liters:
concentration of Cu(OH) = moles of Cu(OH)₂ / volume of Cu(OH) (in liters)

We need to convert the volume of the Cu(OH) solution from milliliters to liters:
volume of Cu(OH) = 72.4 mL = 0.0724 L

Substituting the calculated values, we get:
concentration of Cu(OH) = 0.013384 moles / 0.0724 L = 0.185 M
Therefore, the concentration of Cu(OH) is 0.185 M.

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

Chemical equations must be balanced to satisfy the _____

A. law of definite proportions

B. principle of Avogadro

C. law of conservation of mass

D. law of multiple proportions

Answers

Answer: C. law of conservation of mass

Explanation:

If the mass of aluminum is 1. 80 g and iodine is 2. 30 g how much of the excess reagent remains after the reaction



2Al + 3I2 > 2AlI3

Answers

Total, 0.77 g of I2 is the amount of the excess reagent that remains after the reaction.

To determine the excess reagent remaining, we first need to find the limiting reagent.

The balanced equation tells us that 2 moles of Al react with 3 moles of I₂ to form 2 moles of AlI₃. We can use this information to calculate the theoretical yield of AlI3 based on the amount of each reactant;

moles of Al = 1.80 g / 26.98 g/mol = 0.067 moles

moles of I₂  = 2.30 g / 253.81 g/mol = 0.009 moles

Since the stoichiometry of the reaction is 2:3 for Al and I₂ , respectively, we can see that I₂ is the limiting reagent. Thus, all of the Al will react, while some of the I₂ will be left over.

The amount of AlI₃ that can be formed from the limiting reagent (I2) is:

moles of AlI₃ = 0.009 moles I₂  × (2 moles AlI₃ / 3 moles I₂ )

= 0.006 moles AlI₃

The mass of AlI₃ that can be formed is;

mass of AlI₃ = 0.006 moles × 407.82 g/mol

= 2.47 g

Since we know that only 2.30 g of I₂  was present initially, we can calculate the amount of excess I₂ remaining after the reaction;

excess I₂  = 2.30 g - (0.009 moles I₂  × 253.81 g/mol)

= 0.77 g

Therefore, 0.77 g of reagent that remains after the reaction.

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Toad and Toadette just had their first little toadstool! Toad's family is known to be purebred dominant for red spots on their white cap. Everyone was shocked when Little Toad was born with a white cap with white spots instead of red. Toadette is very upset as she thinks the Mushroom Kingdom Hospital accidentally switched babies. Is this true? Did the hospital really switch babies? Choose either "yes" or "no" and defend your answer.

Answers

No, it is not true that the hospital accidentally switched babies. The trait is most likely due to the inheritance of two recessive alleles.

Inheritance of recessive genes

Toad's family being purebred dominant for red spots on their white cap means that they have two copies of the dominant allele for red spots on their cap.

However, Toadette may carry one copy of the dominant allele and one copy of the recessive allele for white spots on the cap. If Toad also carries one copy of the recessive allele, there is a chance that their offspring may inherit the recessive allele from both parents, resulting in a white cap with white spots.

Therefore, it is entirely possible for Little Toad to inherit the recessive allele for white spots from Toadette and Toad and display the trait. There is no need to suspect the hospital of switching babies as the genetics of the situation explains the observed outcome.

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Small peptides buffer stomach ____________ , so the ph does not fall excessively low.

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Small peptides buffer stomach acid, so the pH does not fall excessively low.

The stomach produces hydrochloric acid, which helps in the digestion of food by breaking down complex molecules into simpler ones. However, excessive production of stomach acid can lead to various digestive disorders, such as acid reflux, ulcers, and gastritis.

Small peptides are short chains of amino acids that are produced during the digestion of proteins. They have a buffering effect on stomach acid by neutralizing the excess acid, which helps to maintain the pH of the stomach within a healthy range.

This buffering action is important for protecting the stomach lining from the harmful effects of excess acid, as well as for ensuring efficient digestion and absorption of nutrients from food.

Therefore, consuming protein-rich foods that can be broken down into small peptides may help to buffer stomach acid and prevent digestive problems associated with excess acid.

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Complete and balance the molecular equation for the reaction between aqueous solutions of lithium fluoride and potassium chloride, and use the states of matter to show if a precipitate forms.


Write the complete ionic equation for the reaction that takes place when aqueous solutions of lithium fluoride and potassium chloride are mixed

Answers

The net ionic equation shows that no new compounds are formed, and no reaction occurs between the two aqueous solutions.

The balanced molecular equation for the reaction between aqueous solutions of lithium fluoride (LiF) and potassium chloride (KCl) is:

LiF(aq) + KCl(aq) → LiCl(aq) + KF(aq)

According to the solubility rules, both LiCl and KF are soluble in water, so no precipitate will form.

The complete ionic equation for the reaction is:

Li⁺(aq) + F⁻(aq) + K⁺(aq) + Cl⁻(aq) → Li⁺(aq) + Cl⁻(aq) + K⁺(aq) + F⁻(aq)

In this equation, the soluble ionic compounds are shown as their dissociated ions in the aqueous solution. The spectator ions (Li⁺ and K⁺) do not participate in the reaction, so they are omitted from the net ionic equation:

F⁻(aq) + Cl⁻(aq) → no reaction

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When 2. 060 g of titanium is combusted in a bomb calorimeter, the temperature of the calorimeter increases from 25. 00°c to 91. 60°c. In a separate experiment, the heat capacity of the calorimeter is measured to be 9. 84 kj/k. The heat of reaction for the combustion of a mole of ti in this calorimeter is ________ kj/mol.

Answers

The heat of reaction for the combustion of a mole of Ti in this calorimeter is 15221.209 kJ/mol.

First, we need to calculate the amount of heat absorbed by the calorimeter:

ΔT = 91.60°C - 25.00°C = 66.60°C

q = (9.84 kJ/°C) x (66.60°C) = 655.344 kJ

Since the combustion of 2.060 g of titanium caused this increase in temperature, we can calculate the heat of reaction per mole of titanium:

molar mass of Ti = 47.87 g/mol

moles of Ti combusted = 2.060 g / 47.87 g/mol = 0.043 mol

ΔHrxn = q / n = 655.344 kJ / 0.043 mol = 15221.209 kJ/mol

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a student proposes the following step of a mechanism. why would an expert question this mechanism step? 3 a b → 2 c

Answers

An expert might question the proposed mechanism step due to:
1. Lack of reaction conditions
2. Lack of experimental evidence
3. Thermodynamic feasibility
4. Kinetic feasibility
5. Stereochemical considerations.

an expert might question the proposed step of the mechanism:

1. Lack of reaction conditions: The expert may question the proposed mechanism step because there is no mention of the reaction conditions. Without knowing the reaction conditions, it is impossible to predict whether the proposed mechanism step is feasible or not.

2. Lack of experimental evidence: The expert may question the proposed mechanism step if there is no experimental evidence to support it. Experimental evidence is necessary to validate any proposed mechanism step.

3. Thermodynamic feasibility: The expert may question the proposed mechanism step if it violates the laws of thermodynamics. The proposed step should be energetically favorable and should not require a large input of energy.

4. Kinetic feasibility: The expert may question the proposed mechanism step if it violates the laws of kinetics. The proposed step should be consistent with the rate of the overall reaction.

5. Stereochemical considerations: The expert may question the proposed mechanism step if it violates stereochemical considerations. The proposed step should be consistent with the observed stereochemistry of the reaction products.

These are just a few possible reasons why an expert might question the proposed step of the mechanism.
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Why a pyramid shape is a good way to model the relative amount of energy in different group of organisms in a food chain

Answers

The pyramid shape is a good way to model the relative amount of energy in different groups of organisms in a food chain because it reflects the energy transfer from one trophic level to another.

In a food chain, energy is transferred from one organism to another through the consumption of food. As each organism consumes the one below it, a large proportion of the energy that was stored in the previous organism is lost as heat or used for metabolic processes such as respiration. This means that there is less energy available for the next organism in the chain.

The pyramid shape reflects this decrease in available energy at each trophic level. The base of the pyramid represents the primary producers, which have the largest amount of energy available to them through photosynthesis. As we move up the pyramid to the next trophic level, the available energy decreases, representing the loss of energy as we move up the food chain.

By using a pyramid shape to model the relative amount of energy in different groups of organisms in a food chain, we can see the significant decrease in available energy at each successive trophic level. This shape helps to illustrate the importance of primary producers in supporting life on Earth and the delicate balance of energy transfer that exists in ecosystems.

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5. Compare the mass of the reactants and the mass of the products in a chemical reaction, and explain how these masses are related

Answers

According to the law of conservation of mass, the total mass of the reactants in a chemical reaction is equal to the total mass of the products.

This means that the mass of the reactants before the reaction is the same as the mass of the products after the reaction. In other words, mass is neither created nor destroyed during a chemical reaction, it is only transformed from the reactants into the products.

Therefore, the masses of the reactants and the products in a chemical reaction are directly related and must balance each other. This relationship is fundamental in chemistry and is used to calculate the amount of reactants and products in a chemical reaction, as well as to predict the outcome of the reaction.

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57.49 g of HCl (aq) reacting with 98.20 g of AgNO3(aq) will produce how many grams of AgCl (s) precipitate?​

Answers

57.49 g of HCl reacting with 98.20 g of [tex]AgNO_3[/tex] will produce 62.3 g of AgCl precipitate.

To determine the grams of AgCl (s) precipitate produced, we first need to write and balance the chemical equation for the reaction between hydrochloric acid (HCl) and silver nitrate ([tex]AgNO_3[/tex]) that produces silver chloride (AgCl) precipitate:

HCl (aq) + [tex]AgNO_3[/tex]  (aq) → AgCl (s) + [tex]HNO_3[/tex] (aq)

From the balanced equation, we can see that one mole of [tex]AgNO_3[/tex] reacts with one mole of HCl to produce one mole of AgCl.

To determine the limiting reactant in the reaction, we need to calculate the number of moles of each reactant:

moles of HCl = 57.49 g / 36.46 g/mol = 1.577 mol

moles of [tex]AgNO_3[/tex] = 98.20 g / 169.87 g/mol = 0.578 mol

Since [tex]AgNO_3[/tex] has fewer moles than HCl, it is the limiting reactant. This means that all of the [tex]AgNO_3[/tex] will be consumed in the reaction, and any excess HCl will be left over.

The number of moles of AgCl produced can be calculated from the number of moles of [tex]AgNO_3[/tex] :

moles of AgCl = moles of [tex]AgNO_3[/tex] = 0.578 mol

The mass of AgCl produced can be calculated using the molar mass of AgCl:

mass of AgCl = moles of AgCl x molar mass of AgCl

mass of AgCl = 0.578 mol x (107.87 g/mol) = 62.3 g

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At a constant pressure, a sample of gas occupies 420ml at 210k. what volume does the gas occupy at 250k

Answers

At a constant pressure, the gas occupies a volume of 500 ml when the temperature is increased to 250k.

At a constant pressure, the volume of a gas is directly proportional to its temperature. This relationship is known as Charles' Law. According to the problem, the sample of gas occupies 420 ml at a temperature of 210k. We need to find out the volume of the gas when the temperature is increased to 250k.

To solve this problem, we can use the formula V1/T1 = V2/T2, where V1 is the initial volume, T1 is the initial temperature, V2 is the final volume, and T2 is the final temperature. Plugging in the given values, we get:

420 ml/210k = V2/250k

Simplifying this equation, we get:

V2 = (420 ml/210k) x 250k
V2 = 500 ml

Therefore, at a constant pressure, the gas occupies a volume of 500 ml when the temperature is increased to 250k.

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1. Draw the structure of diiodine monoselenide and


a. Write the formula


b. Determine the molecular geometry


C. Calculate the formal charge of EACH element. (SHOW ALL WORK)

Answers

Diiodine monoselenide is an inorganic compound with the chemical formula I2Se. It is a dark red solid that is sparingly soluble in water. The structure of diiodine monoselenide consists of a linear Se-I-I unit, with the selenium atom in the middle and the two iodine atoms on either side. This arrangement gives the compound a linear, V-shaped structure.

Diiodine monoselenide is an important compound in the field of materials science, as it exhibits some interesting properties. For example, it can be used as a precursor for the synthesis of various selenium-containing compounds, including organoselenium compounds, which are used in catalysis and medicine.

Additionally, diiodine monoselenide has been studied as a potential material for use in electronic devices, due to its semiconducting properties. In conclusion, diiodine monoselenide is an important inorganic compound that exhibits some interesting structural and material properties.

Its linear, V-shaped structure is due to the arrangement of the selenium and iodine atoms in a linear Se-I-I unit. This compound is used in the synthesis of various selenium-containing compounds and has potential applications in the field of electronics.

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Help what’s the answer?

Answers

The number of moles in 1.16 × 10³g of Fe₂O₃ is 7.26 moles.

How to calculate number of moles?

The number of moles in a substance can be calculated by dividing the mass of the substance by its molar mass as follows:

no of moles = mass ÷ molar mass

According to this question, 1.16 × 10³ grams of iron (II) oxide is given. The molar mass of this compound is 159.69 g/mol.

no of moles in Fe₂O₃ = 1160g ÷ 159.69g/mol = 7.26 moles.

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In the 17th group of modern periodic table, there are Flourine, Chlorine, Bromine, Iodine respectively. Which element has the highest ability to receive electrons? Why?

Answers

In the 17th group of the modern periodic table, fluorine has the highest ability to receive electrons.

This is because it has the highest electronegativity among the elements in this group, making it more likely to attract and accept electrons from other elements during chemical reactions.

Fluorine is indeed the most electronegative element in the periodic table. Electronegativity is a measure of an atom's tendency to attract electrons in a chemical bond.

Fluorine's high electronegativity arises from its small atomic size and strong nuclear charge, which results in a strong attraction for electrons.

Due to its high electronegativity, fluorine has a strong ability to attract and accept electrons from other elements during chemical reactions. It readily forms covalent bonds by sharing electrons with less electronegative elements.

Fluorine's electron affinity and its ability to form stable, negatively charged ions make it a strong oxidizing agent.

It's worth noting that the trend of increasing electronegativity generally follows from left to right across a period and decreases down a group in the periodic table.

Therefore, while fluorine is the most electronegative element in Group 17 (the halogens), it may not necessarily have the highest ability to receive electrons among all elements in the 17th group.

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CHEMISTRY HELP NEEDED IMMEDIATELY PLEASE !! I need all questions answered by tonight, please. Someone help

How many grams of oxygen would be needed to react with 4.06 grams of carbon tetrahydride? Balanced Equation: _______________________________________________________
2. How many grams of oxygen would be produced from the decomposition of 12.3 grams of sulfur trioxide?
Balanced Equation: _______________________________________________________

3. How many grams of potassium would be needed to synthesize 34 grams of potassium chloride? Balanced Equation: _______________________________________________________
4. A lab technician combusts 15.0 grams of octane (C8H18) with excess oxygen and is able to recover 44.7 grams of carbon dioxide gas. Calculate the percent yield for this process. Hint: You must balance the equation first!
C8H18 + O2 → CO2 + H2O
---------------------------------------------------------------------------------------------------------------------------------------------------
ANS KEY (in random order):

1. ) 16.3 g O2
2.) 7.37 g O2
3.) 18 g K
4.) 92.3% (48.4g CO2)

Answers

The mass of oxygen is 16 g

The mass of oxygen is 2.4 g

What is the stoichiometry?

We know from the balanced reaction equation that;

[tex]CH_{4}[/tex]+ 2[tex]O_{2}[/tex] ---> [tex]CO_{2}[/tex] + 2[tex]H_{2} O[/tex]

Number of moles of[tex]CH_{4}[/tex] = 4.06 g/16 g/mol

= 0.25 moles

If 1 mole of [tex]CH{4}[/tex] reacts with 2 moles of[tex]O_{2}[/tex]

0.25 moles of [tex]CH_{4}[/tex] reacts with 0.25 * 2/1

= 0.5 moles

Mass of the oxygen = 0.5 moles * 32 g/mol

= 16 g

The balanced reaction equation is;

2S[tex]O_{3}[/tex](g)⇋2S[tex]O_{2}[/tex](g)+[tex]O_{2}[/tex](g)

Number of moles of sulfur trioxide = 12.3 g/80 g/mol

= 0.15 moles

If 2 moles of S[tex]O_{3}[/tex] produces 1 mole of oxygen

0.15 moles ofS[tex]O_{3}[/tex]will produce 0.15 * 1/2

= 0.075 moles

Mass of oxygen = 0.075 moles * 32 g/mol

= 2.4 g

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Why is there a temperature difference between la and ny​

Answers

There are several factors that can contribute to the temperature difference between Los Angeles (LA) and New York (NY).

One of the most significant factors is their geographical location. LA is located on the west coast of the United States, close to the Pacific Ocean, which has a cooling effect on the city's climate.

In contrast, NY is situated on the east coast, where it is influenced by the warm Gulf Stream current, which has a warming effect on the city's climate.

Another factor that contributes to the temperature difference between the two cities is their elevation. LA is situated at a much lower elevation than NY, which means it is closer to sea level.

This can result in warmer temperatures as the air is denser at lower elevations and can hold more heat. In contrast, NY's higher elevation means that the air is thinner, and it can't hold as much heat, resulting in cooler temperatures.

Finally, the two cities have different climate zones. LA has a Mediterranean climate, which means it has warm, dry summers and mild, wet winters. In contrast, NY has a humid subtropical climate, which means it has hot, humid summers and cold, snowy winters.

These different climate zones can result in significant temperature differences between the two cities.

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A0.205g sample of caco3(mr=100.1g/mol) is added to a flask a long with7.50 mlof2.00mhcl. caco3(aq)+2hcl(aq)→ cacl2(aq)+h2o(l)+co2(g) enough water is then added to make a 125.0ml solution. a10.00ml aliquot of this solution is taken and titrated with 0.058m naoh. naoh(aq)+hcl(aq)→ h2o(l)+nacl(aq) how many ml of naoh are used?​

Answers

129.3 mL of NaOH are required to react with all the HCl in the 10.00 mL aliquot.

To solve this problem, we need to use stoichiometry and the concept of limiting reagents.

First, let's calculate the number of moles of HCl used in the reaction:
7.50 mL of 2.00 M HCl = 0.015 mol HCl

Next, let's use stoichiometry to determine the number of moles of CaCO₃ that reacted with the HCl:
1 mol CaCO₃ reacts with 2 mol HCl
0.015 mol HCl x (1 mol CaCO₃ / 2 mol HCl) = 0.0075 mol CaCO₃

Now we can use the mass and molar mass of CaCO₃ to determine the mass of CaCO₃ used:
mass CaCO₃ = number of moles x molar mass
mass CaCO₃ = 0.0075 mol x 100.1 g/mol = 0.751 g

However, this mass was used to make a 125.0 mL solution, so we need to calculate the concentration (in M) of this solution:
0.751 g / 125.0 mL = 0.006008 M

Now we can use the volume and concentration of the NaOH solution to determine the number of moles of NaOH used:
10.00 mL of 0.058 M NaOH = 0.00058 mol NaOH

Finally, we can use stoichiometry to determine the volume of NaOH required to react with all the HCl in the 10.00 mL aliquot:
1 mol HCl reacts with 1 mol NaOH
0.0075 mol HCl x (1 mol NaOH / 1 mol HCl) = 0.0075 mol NaOH
volume of NaOH = number of moles / concentration
volume of NaOH = 0.0075 mol / 0.058 M = 0.1293 L = 129.3 mL

Therefore, 129.3 mL of NaOH are required to react with all the HCl in the 10.00 mL aliquot.

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bright, yellow-orange sunsets only occur when the atmosphere . a. is fairly clean b. contains a fair amount of suspended particulates c. contains small suspended salt particles and water molecules d. includes sulfuric acid droplets

Answers

Bright, yellow-orange sunsets only occur when the atmosphere is  fairly clean. The correct option is a.

The sky above is the one aspect of the atmosphere. In the reality, the planet's atmosphere is made up of the numerous layers of the gases. The two gases that are the most prevalent in the Earth's atmosphere are by the far nitrogen and the oxygen. About the 78% of dry air will contains nitrogen, and about the 21% of it is the oxygen.

Fewer than the 1% of the atmosphere is made up of the combination of the gases, including the carbon dioxide and the argon, the Water vapor. Therefore, the correct option is a.

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How many grams of chlorine would exert a pressure of 610 torr in a 3. 26-liter container at standard temperature? 4. 25gCL

Answers

3.86 grams of chlorine would exert a pressure of 610 torr in a 3.26-liter container at standard temperature.

To calculate the number of grams of chlorine required to exert a pressure of 610 torr in a 3.26-liter container at standard temperature, we need to use the ideal gas law equation: PV = nRT.

Where,

P = pressure = 610 torr

V = volume = 3.26 L

n = number of moles

R = gas constant = 0.0821 Latm/(molK) (standard value)

T = temperature = 273 K (standard temperature)

n = PV ÷ RT

Substituting the given values, we get:

n = (610 torr × 3.26 L) ÷ (0.0821 Latm/(molK) × 273 K)

n = 0.109 mol

Now, to convert moles to grams, we need to use the molar mass of chlorine, which is 35.45 g/mol.

Thus, number of grams of chlorine required is:

0.109 mol × 35.45 g/mol = 3.86 g

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Sometimes a dolphin will be forced out of its group. predict one effect of a dolphin living without a group. use evidence to support your response.​

Answers

A dolphin living without a group can experience increased stress levels and difficulty in finding food and mating partners.

What is Dolphin?

A dolphin is a highly intelligent and social aquatic mammal that belongs to the family Delphinidae. Dolphins are known for their playful behavior, high intelligence, and communication skills.

Dolphins are highly social animals that live in groups called pods. Being a social animal, dolphins depend on their pod for several important aspects of their life, including hunting, mating, and protection. When a dolphin is forced out of its pod, it loses the benefits of group living and is forced to live alone. This can lead to increased stress levels for the dolphin, as it has to fend for itself and find its own food without the help of the pod.

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Item 2 Explain how crustal deformation builds landforms. When sediments are laid down over vast areas the forces involved create rock over a very long period of time. When two tectonic plates start to push into each other they can rise up and build mountains, or sink under and create deep valleys. When wind and rain slowly wear away rock, they leave behind new looking land forms. When two tectonic plates slide away from each other the inner liquid layer of the mantle comes to the surface as lava and creates new islands

Answers

When the force of tectonic plates pushing against each other become too strong the plates break and create faults.

What is tectonic plates?

Tectonic plates are large, rigid pieces of the Earth's lithosphere that move relative to one another. The lithosphere is the rocky outer layer of the Earth that includes the crust and part of the upper mantle. Tectonic plates can vary in size from a few hundred to thousands of kilometers in diameter. They interact at their boundaries and are responsible for the formation and destruction of the Earth's surface features, such as mountains and ocean trenches. Movement of the plates helps explain the occurrence of earthquakes, volcanic eruptions, mountain building, and oceanic trench formation. In plate tectonics, the lithosphere is divided into seven major plates and several minor ones. The major plates include the African, Antarctic, Eurasian, Indo-Australian, North American, Pacific, and South American plates. The plates move at a rate of several centimeters per year in response to convection currents in the mantle.

When the force of tectonic plates pushing against each other become too strong the plates break and create faults. This can cause folding of the crust to create mountains or reverse faults can create deep valleys. Volcanoes are also involved in the formation of landforms as they create mountains, ridges and canals. Earthquakes can also cause landforms to form in areas that were previously flat.

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Why does LiH have the largest hydrogen? ( here's the image) http://imgur.com/a/dAVX7
A)A potential map marks the edges of the molecules electron cloud. The electron cloud is smallest around the H in LiH, because that H has less electrons around it than the Hs in the other molecules.
B)A potential map marks the edges of the molecules electron cloud. The electron cloud is smallest around the H in LiH, because that H has more electrons around it than the Hs in the other molecules.
C)A potential map marks the edges of the molecules electron cloud. The electron cloud is largest around the H in LiH, because that H has more electrons around it than the Hs in the other molecules.
D)A potential map marks the edges of the molecules electron cloud. The electron cloud is largest around the H in LiH, because that H has less electrons around it than the Hs in the other molecules.
Part B) Which compound has the hydrogen that would be most apt to attract a negatively charged molecule?
H2
LiH
HF

Answers

The correct answer to the first question is A) A potential map marks the edges of the molecules electron cloud. The electron cloud is smallest around the H in LiH, because that H has less electrons around it than the Hs in the other molecules.

This is because LiH is an ionic compound, and the electron from the hydrogen atom in LiH is pulled towards the Li+ ion, making the hydrogen atom partially positively charged and the Li+ ion partially negatively charged.

As a result, the electron cloud around the hydrogen atom is smaller compared to the other molecules.

The correct answer to the second question is HF. This is because fluorine is the most electronegative element among the given options, and the hydrogen atom in HF is partially positively charged.

As a result, it can attract a negatively charged molecule more strongly compared to the other options.

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A student places a metal sphere with a temperature of 98 degress Celsius into a container of water with a temperature of 50 degress Celsius. Which of these is most likely the temperature of the water after the sphere and the water have reached thermal equilibium?



40 degree Celsius



50 degrees Celsius



70 degrees Celsius



100 degrees Celsius

Answers

The most likely temperature of the water after the sphere and the water has reached thermal equilibrium is approximately 70 degrees Celsius. So option C is correct.

This is because heat energy will flow from the metal sphere to the water until they both reach the same temperature. The initial temperature difference between the metal sphere and the water will cause heat to flow from the sphere to the water. As the heat flows, the metal sphere will cool down and the water will heat up. Eventually, they will both reach the same temperature, which will be somewhere between the initial temperatures of the sphere and the water. Therefore option: c is Correct.

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What volume of oxygen gas at STP would be needed


to react completely with 1. 55 g of aluminum?

Answers

The volume of oxygen gas at STP that would be needed to react completely with 1.55 g of aluminum is 2.24 L.

The balanced chemical equation for the reaction of aluminum with oxygen gas is:

4Al + 3O₂ → 2Al₂O₃

From the equation, we can see that 4 moles of aluminum react with 3 moles of oxygen gas to produce 2 moles of aluminum oxide. We need to first calculate the number of moles of aluminum present in 1.55 g of aluminum:

moles of Al = mass/molar mass = 1.55 g/ 26.98 g/mol = 0.0574 mol

According to the balanced equation, 3 moles of oxygen gas react with 4 moles of aluminum. Therefore, the number of moles of oxygen gas required can be calculated as:

moles of O₂ = (3/4) * moles of Al = (3/4) * 0.0574 mol = 0.0431 mol

Finally, we can use the ideal gas law to calculate the volume of oxygen gas at STP (standard temperature and pressure, 0°C and 1 atm) that is required:

PV = nRT

where P = 1 atm, V = volume of gas, n = 0.0431 mol, R = 0.0821 L·atm/mol·K, and T = 273 K.

Solving for V, we get:

V = nRT/P = (0.0431 mol) * (0.0821 L·atm/mol·K) * (273 K) / (1 atm) = 2.24 L


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PLEASE HELP MEEEEE PLEASEEEE


Given the following reaction: CuO (s) + H2 (g) ® Cu (s) + H2O (g) If 357. L of hydrogen gas are used to reduce copper (II) oxide at STP, what mass of copper is to be expected?

Answers

The mass of copper produced from the reaction of 357 L of H₂ gas with CuO at STP is 949 g.

Using the ideal gas law equation PV = nRT, Pressure is P, temperature is T, gas constant is R, volume is V and moles are n. From the balanced chemical equation, we know that 1 mole of Cu reacts with 1 mole of H₂.

1. The mass of Cu produced is equal to the number of moles of Cu times its molar mass since copper has a molar mass of 63.55 g/mol. Therefore, the steps to solve the problem are,

Convert the volume to liters,

357 L

Calculate the number of moles of H₂ using the ideal gas law:

PV = nRT

(1 atm) (357 L) = n (0.0821 L·atm/mol·K) (273 K)

n = 14.94 mol

2. Calculate the number of moles of Cu based on the balanced chemical equation,

1 mole Cu : 1 mole H₂

14.94 mol H₂ : x mole Cu

x = 14.94 mol

3. Calculate the mass of Cu produced:

m = n × M, mass in grams is m, the number of moles is n, the molar mass of Cu is M.

M(Cu) = 63.55 g/mol

m = 14.94 mol × 63.55 g/mol

m = 949 g

Therefore, the mass of copper produced is 949 g.

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What is the volume of 34. 6 mol O2 at 2. 5 atm and 30 oC?

Answers

The answer is  is approximately 344.16 L.

To find the volume of 34.6 mol O2 at 2.5 atm and 30°C, we can use the Ideal Gas Law equation: PV = nRT.

In this equation:
P = pressure (2.5 atm)
V = volume (which we need to find)
n = moles of gas (34.6 mol O2)
R = ideal gas constant (0.0821 L atm/mol K)
T = temperature in Kelvin (30°C + 273.15 = 303.15 K)

Rearrange the equation to solve for V: V = nRT / P

Now, plug in the values: V = (34.6 mol)(0.0821 L atm/mol K)(303.15 K) / (2.5 atm)

Calculate the volume: V ≈ 344.16 L

The volume of 34.6 mol O2 at 2.5 atm and 30°C is approximately 344.16 L.

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the molar solubility of lead phosphate in a 0.202 m sodium phosphate solution is_______m.

Answers

the molar solubility of lead phosphate in a 0.202 M sodium phosphate solution is approximately 1.27 × 10^-7 M.

To calculate the molar solubility of lead phosphate in a sodium phosphate solution, we need to use the solubility product constant (Ksp) of lead phosphate and the common ion effect of sodium phosphate.

The balanced equation for the dissolution of lead phosphate (Pb3(PO4)2) is:

Pb3(PO4)2(s) ⇌ 3Pb2+(aq) + 2PO42-(aq)

The Ksp expression for lead phosphate is:

Ksp = [Pb2+]^3[PO42-]^2

The balanced equation for the dissociation of sodium phosphate (Na3PO4) is:

Na3PO4(s) ⇌ 3Na+(aq) + PO42-(aq)

In a 0.202 M sodium phosphate solution, the concentration of the PO42- ion is [PO42-] = 3 × 0.202 M = 0.606 M, due to the dissociation of sodium phosphate.

To calculate the molar solubility of lead phosphate, we can assume that x mol/L of Pb3(PO4)2 dissolves and forms 3x mol/L of Pb2+ and 2x mol/L of PO42-. Using the Ksp expression and the common ion effect, we can write:

Ksp = [Pb2+]^3[PO42-]^2
Ksp = (3x)^3(2x)^2 = 108x^5

Since the concentration of PO42- is 0.606 M, the concentration of Pb2+ is also 3x = 3(0.202 M - x). Substituting this into the Ksp expression gives:

Ksp = (3x)^3(2x)^2 = 108x^5
4.8 × 10^-27 = (3(0.202 - x))^3(2x)^2

Solving for x, we get:

x = 1.27 × 10^-7 M

Therefore, the molar solubility of lead phosphate in a 0.202 M sodium phosphate solution is approximately 1.27 × 10^-7 M.
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How does a scientist make two solutions with the same molarity?
OA. By dissolving the maximum amount of each substance in the
same volume of water
OB. By dissolving the same number of moles of each substance in the
same volume of water
OC. By dissolving 1 mole of each substance in enough water to make
sure dissolving is complete
OD. By dissolving the same number of grams of each substance in the
same volume of water
SUBMIT

Answers

The term molarity is an important method which is used to calculate the concentration of a solution. By dissolving the same number of moles of each substance in the same volume of water we can make solutions of same molarity. The correct option is B.

Molarity is defined as the number of moles of the solute present per litre of the solution. It is represented as 'M' and its unit is mol / L. The term molarity is also called the molar concentration.

When same number of moles of substances are dissolved in the same volume of water, then the two solutions have same molarity.

Thus the correct option is B.

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Complete the following reaction



a. HN03 + KOH -->. +.



b. HCl + LiOH -->. +.



c. H2S + NaOH -->. +

Answers

a. HNO3 + KOH --> KNO3 + H2O

b. HCl + LiOH --> LiCl + H2O

c. H2S + 2NaOH --> Na2S + 2H2O

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