The mass of solute will dissolve in 100g of water at the following temperatures will be 153 gms, 40 gms, 70gms simultaneously.
How dissolution of solute is affected by temperature ?On increasing temperature the amount of solute for dissolution decreases.
It is independent of the nature of solute.
Hence,
KNO₃ at 70degree = 153 gmsNaCl at 100 degree = 40 gmsNH₄Cl at 90 degree = 70gmsLearn more about dissolution here ;
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the teacher prepares 2.50 liters (l) of a salt solution for a class experiment. how many quarts (qt) are in 2.50 l? (1 l =1.06 qt)
The amount of quarts in 2.50 L is 2.65 qt
How many quarts are in 2.50 l?Since the teacher prepares 2.50 liters of salt solution for a class experiment, we require how many quarts there are in 2.50 liters.
Since we know that 1 L = 1.06 qt, converting liters to quarts, we have
2.50 L = 2.50 × 1 L
= 2.50 × 1.06 qt
= 2.65 qt
So, the amount of quarts in 2.50 L is 2.65 qt
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A 25.0 g sample of metal at
16.0 °C is warmed to 22.1 °C
by 259 ] of energy.
What is the change in temperature
for the metal?
Record your answer to the tenths place.
The change in temperature of the metal is 6.1°C. Details about change in temperature can be found below.
How to calculate change in temperature?The change in temperature of a substance can be calculated by subtracting the initial temperature of the substance from the final temperature.
According to this question, a 25.0 g sample of metal at 16.0 °C is warmed to 22.1 °C by 259J of energy.
This means that the change in temperature of the metal can be calculated as:
∆T = 22.1°C - 16°C
∆T = 6.1°C
Therefore, the change in temperature of the metal is 6.1°C.
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Answer: 6.1°C.
Explanation: just for some extra verification, the answer is indeed 6.1°C. Hope this helps and have a great day!
Describe the characteristics that identify a sample of matter as being a substance.
Answer:
Any characteristic that can be measured, such as an object's density, color, mass, volume, length, malleability, melting point, hardness, odor, temperature, and more, are considered properties of matter.
PROBLEMS
1. What is the molarity of 4 grams of NaOH dissolved in 1 liter of solution?
2. What is the molarity of 4 grams of NaOH dissolved in 0.5 liter of solution
3. What is the molarity of 4 grams of NaOH dissolved in 0.1 liter of solution
4. Which of the 3 solutions above is more concentrated and why?
Answer:
1.) 0.1 M
2.) 0.2 M
3.) 1 M
4.) Solution #3 is the most concentrated because it has the highest molarity. This solution has the largest solute to solvent ratio. The more solvent there is, the lower the concentration and molarity.
Explanation:
To find the molarity, you need to (1) convert grams NaOH to moles (via molar mass from periodic table) and then (2) calculate the molarity (via the molarity equation). All of the answers should have 1 sig fig to match the given values.
Molar Mass (NaOH): 22.99 g/mol + 16.00 g/mol + 1.008 g/mol
Molar Mass (NaOH): 39.998 g/mol
4 grams NaOH 1 mole
---------------------- x ------------------ = 0.1 moles NaOH
39.998 g
1.)
Molarity = moles / volume (L)
Molarity = (0.1 moles) / (1 L)
Molarity = 0.1 M
2.)
Molarity = moles / volume (L)
Molarity = (0.1 moles) / (0.5 L)
Molarity = 0.2 M
3.)
Molarity = moles / volume (L)
Molarity = (0.1 moles) / (0.1 L)
Molarity = 1 M
An ice cube absorbs 353 cal of
energy from its surroundings.
How many joules of energy is
this?
Answer:
1482.6 J
Explanation:
353 cal * 4.2 J / 1 cal = 1482.6 J
An ice cube absorbs 353 cal of energy from its surroundings. Number of joules of energy is 1482.6 Joules.
What is Energy?The ability to do work is called as energy. Work done is product of force and displacement. Energy is of different types as sound energy, kinetic energy, potential energy, electrical energy, light energy etc.
Law of conservation of energy states that energy can neither be created nor destroyed, but it can be transferred from one form to another.
Molecules can move so they show kinetic energy, molecules can be there at many positions so they can show potential energy, molecules can vibrate so they can show sound energy but molecules can only absorb light hence they can't have light energy.
1 calorie of energy has 4.2 Joules.
Given, 353 Calories of Energy
Hence, 353 Calories of Energy has 1482.6 Joules.
Therefore, An ice cube absorbs 353 cal of energy from its surroundings. Number of joules of energy is 1482.6 Joules.
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The chemical formula for a emerald is BeAl2(SiO3)6.
An emerald can be described as
Emerald can be described as a transparent, green coloured gem stone made up of mineral beryl together with trace amount of chromium or sometimes vanadium having chemical formula as [tex]Be_3Al_2(SiO_3)_6[/tex] .
Through time, the emerald has been known as a symbol of truth and love.
In ancient Greece and Rome, emerald was said to be the gemstone of the goddess Venus, purveyor of love and hope.
On the other side of the world, emeralds were revered by the Incas and believed by the Egyptians to be a source of eternal life.
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Which energy source from a reservoir would provide affordable, abundant electricity for a factory? solar panels wind turbines gas generators a hydroelectric plant
The energy source from a reservoir would provide affordable, abundant electricity for a factory is a hydroelectric power plant; option D.
What is energy?Energy is the ability to do work.
Energy generating plants may either use wind, water or solar energy to produce electrical energy.
The most abundant source of energy from a reservoir is hydroelectric power plant.
Therefore, the energy source from a reservoir would provide affordable, abundant electricity for a factory is a hydroelectric power plant.
In conclusion, hydroelectric power plants are reservoirs of abundant energy supply.
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How many electrons are in a ion that has 16 protons and 59 neutrons if it has negative 2 charge?
Which statement illustrates the difference between a chemical reaction and a nuclear reaction?A nuclear reaction releases more energy per gram and appears to violate the law of conservation of mass.A nuclear reaction releases less energy per gram and appears to violate the law of conservation of mass.A nuclear reaction releases more energy per gram but does not appear to violate the law of conservation of mass.A nuclear reaction releases less energy per gram but does not appear to violate the law of conservation of mass.
According to the research, a nuclear reaction releases less energy per gram and appears to violate the law of conservation of mass.
What is a nuclear reaction?It is a procedure that leads to combining and modifying the nuclei of atoms and subatomic particles and appears to violate the law of conservation of mass.
Through this kind of process, the nuclei can be combined or fragmented, absorbing or releasing particles and energy according to each case.
Therefore, we can conclude that according to the research, a nuclear reaction releases less energy per gram and appears to violate the law of conservation of mass.
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entir
What is the striking back of
the
bunsen-
burner?
Answer:
With too little air, the gas mixture will not burn completely and will form tiny carbon particles that are heated to glowing, making the flame luminous. With too much air, the flame may burn inside the burner tube; that is, it may strike back.
5.00g of an unknown metal we know has a +2 charge (M^+2) is reacted with an excess of hydrochloric acid (HCl(aq)). The product is dried and weighs 11.35 grams. What is the formula and name of the product formed?
the formula: MCl₂
name of the product formed: chloride salt + hydrogen
6.0 mol NaOH reacts with
9.0 mol H3PO4 according to
the equation below:
3NaOH + H3PO4 → 3H₂O + Na3PO4
How many moles of Na3PO4 form from
9.0 mol H3PO4?
[?] mol Na3PO4
Round your answer to the tenths place.
Taking into account the reaction stoichiometry, 2 moles of Na₃PO₄ can be produced when 6.0 mol NaOH reacts with 9.0 mol H₃PO₄.
Reaction stoichiometryIn first place, the balanced reaction is:
3 NaOH + H₃PO₄ → 3 H₂O + Na₃PO₄
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
NaOH: 3 moles H₃PO₄: 1 mole H₂O: 3 molesNa₃PO₄: 1 moleLimiting reagentThe limiting reagent is one that is consumed first in its entirety, determining the amount of product in the reaction. When the limiting reagent is finished, the chemical reaction will stop.
Limiting reagent in this caseTo determine the limiting reagent, it is possible to use a simple rule of three as follows: if by stoichiometry 1 mole of H₃PO₄ reacts with 3 moles of NaOH, 9 moles of H₃PO₄ reacts with how many moles of NaOH?
[tex]moles of NaOH=\frac{9 moles of H_{3} PO_{4} x3 moles of NaOH}{1 mole of H_{3} PO_{4}}[/tex]
moles of NaOH= 27 moles
But 27 moles of NaOH are not available, 6 moles are available. Since you have less moles than you need to react with 9 moles of H₃PO₄, NaOH will be the limiting reagent.
Moles of Na₃PO₄ formedConsidering the limiting reagent, the following rule of three can be applied: if by reaction stoichiometry 3 moles of NaOH form 1 mole of Na₃PO₄, 6 moles of NaOH form how many moles of Na₃PO₄?
[tex]moles of Na_{3}P O_{4} =\frac{6 moles of NaOHx1 mole of Na_{3}P O_{4} }{3 moles of NaOH}[/tex]
moles of Na₃PO₄= 2 moles
Then, 2 moles of Na₃PO₄ can be produced when 6.0 mol NaOH reacts with 9.0 mol H₃PO₄.
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Answer:
The first one is 2 but the second one is 9
Explanation:
Use the periodic table to answer the questions below.
Which diagram shows the correct electron
configuration for nitrogen (N)?
N N N1
1s
2s
2p
NN ILL
1s 2s
2p
N N
1s
2s
DONE✔
2p
The diagram that show the correct electron configuration is the second option. ⬆⬇1s, ⬆⬇2s, ⬆⬆⬆2p.
What is electronic configuration?The electronic configuration is the representation of electron present indifferent energy levels is an atom. The different type of orbitals are s, p, d, and f.
Thus, the correct option is 2, ⬆⬇1s, ⬆⬇2s, ⬆⬆⬆2p.
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Sulfuric acid is an important industrial chemical that
is usually produced by a series of reactions. One of
these involves an equilibrium between gaseous sulfur
dioxide, oxygen, and sulfur trioxide.
2 SO₂(g) + O₂(g) 2 SO₂(g)
If 2.5 mol of sulfur dioxide gas and 2.0 mol of
oxygen gas are placed in a sealed 1.0 L container
and allowed to reach equilibrium, 0.75 mol of sulfur
dioxide remains. Use an ICE table to determine the
concentration of the other gases at equilibrium.
The concentration of sulphur dioxide = 0.75 mol/litre, The concentration of Oxygen is 1.125 mol/litre, The concentration of sulphur trioxide is 1.75 mol/l.
What is a Balanced Equation ?A equation in which the atoms of each element in the reactants and the products are same is called Balanced Equation .
The equation given is
2 SO₂(g) + O₂(g) 2 SO₃(g)
The initial moles of sulphur dioxide gas = 2.5 mol.
Initial Moles of Oxygen is 2 moles
The moles of sulphur dioxide gas at equilibrium is 0.75 mol
The mole ratio of sulphur dioxide to oxygen is 2:1
The mole ratio of sulphur dioxide to sulphur trioxide is 1 :1
The used up moles of sulphur dioxide is
2.5 - 0.75 = 1.75 mol
The oxygen required by 1.75 mole is 0.875 mol
The oxygen at equilibrium will be
2 -0.875
1.125 mol
The sulphur trioxide formed from 1.75 mol of sulphur dioxide at the equilibrium will be 1.75 mol.
Concentration = moles / Volume
Volume = 1L
Therefore the concentration of sulphur dioxide = 0.75 mol/litre
The concentration of Oxygen is 1.125 mol/litre
The concentration of sulphur trioxide is 1.75 mol/l.
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How many moles of sulfur are in 80 grams of sulfur?
A. 1.5 moles
B. 2.5 moles
C. 1 mole
D. 2 moles
Answer:
2.5 moles
Explanation:
Number of moles = MassMolar mass
= 80⋅g32.06⋅g⋅mol−1 = ??mol
Note that sulfur likely exists in its elemental state as S8. I am perfectly justified in treating sulfur as S. The number of sulfur atoms is the same in each case.
deduce the molecular formula of hydrogen 18.2%, carbon 81.8%, relative molecular mass is 44
Answer:
let number of carbon is an
Explanation:
hence 12 and + 2n is equal to 126
14 and is equal to 126
n is equal to 9
Scientists are trying to find out why bees are dying in large numbers. Which best describes how the scientists will try to solve the problem?
A. They will do the same experiments to obtain similar evidence.
B. They will only work with scientists who share the same opinions.
C.
They will observe the same patterns and draw the same conclusions
D.
They will approach the problem in different ways but share ideas.
Answer: D. They will approach the problem in different ways but share ideas.
What is the substance produced by a chemical reaction called?
a. Reactant
b. Product
c. Resultant
d. Reagent
e. Summation
Answer:
=> 11. d. Moon
The moon is not a light source because it does not emit its own light.
=> 12. b. The light is refracted.
13. What is the substance produced by a chemical reaction called?
=> b. Product
Which component or condition of a reaction affects the rate of the reaction but is not consumed during the course of the reaction?.
Answer:
A catalyst is a substance that can be added to a reaction to increase the reaction rate without getting consumed in the process.
Explanation:
Answer:
Catalyst
Explanation:
What is the word equation for atoms of magnesium reacting with molecules of oxygen to produce magnesium oxide?
Answer:
The "word equation" is Magnesium + Dioxygen → Magnesium Oxide
Explanation: This is also the same as Mg + O₂ → MgO.
Which industrial methods of preparing alcohol are more economical? Explain.
The industrial methods of preparing alcohol that is more economical is fermentation.
What is fermentation?Fermentation is defined as the industrial method by which starch is converted to ethyl alcohol by using some specific enzymes and microorganisms known as yeast
It is an economical method because the raw material which is starch is readily available.
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what is the percent yield of sulfur dioxide if the burning of 25.0 g of carbon disulfide produces 40.5 g of sulfur dioxide?
Answer:
25-54-46-36 619-73 77-88-50
Helpp!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
A homogenous mixture is that mixture in which the components mix with each other and its composition is uniform throughout the solution. A heterogenous mixture is that mixture in which the composition is not uniform throughout and different components are observed.
will you be my friend
Answer:
your cool
Explanation:
Two samples contain sulfur and
oxygen in the amounts shown in the
data table. What is the mass percent
of sulfur in compound B?
Sample Mass S (g) Mass 0 (g)
A
32.0
48.0
B
30.0
30.0
Answer:
Sample A=40 Sample B=50
Explanation:
32+48=80
32/80x100=40
The 100 is to convert it to a percentage
___________________________
Sample B
same thing
30+30=60
30/60x100=50
The mass percent of sulfur in compound B is 50 %
What is mass percent?Mass percent is defined as a way of expressing a concentration or describing the component in a particular mixture.
It can also be defined as a mass of a element or solute divided by the mass of compound or solvent.
Mass percent of sulfur of sample A
= 32 + 48 = 80
= 32 / 80 x 100
= 40 %
Mass percent of sulfur of sample B
= 30 + 30 = 60
= 30 / 60 X 100
= 50 %
Thus, the mass percent of sulfur in compound B is 50 %
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There are 4.78 g of dry LICIO4 and
2.43 g H₂O in the sample.
Step 2: Determine the moles of water and anhydrous compound.
Li = 6.94 g/mol, Cl = 35.45 g/mol,
H = 1.01 g/mol, O = 16.00 g/mol
How many moles of LICIO4 are present?
[?] mol LICIO4
Answer:
The number of moles of H₂O is 0.135 mol.
The number of moles of LiClO₄ is 0.0449 mol.
Explanation:
Mole is an important standard unit used for the measurement of large quantities of atoms, molecules, or other particles. One mole is equal to 6.022×10²³ units.
The number of moles of a substance is calculated by:
[tex]\frac{mass of substance}{molecular weight of substance}[/tex]
To find the number of moles of H₂O:
Mass of H₂O in the sample = 2.43g
The molecular weight of H₂O = 18.02g
Number of moles = [tex]\frac{2.43}{18.02}[/tex] = 0.135 mol.
To find the number of moles of LiClO₄:
Mass of LiClO₄ given = 4.78g
The molecular weight of LiClO₄ = 106.39g
Number of moles = [tex]\frac{4.78}{106.39}[/tex] = 0.0449 mol.
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Answer:
0.0449
Explanation:
No probelm
If the pH of a solution is 4.7, what is the H+ concentration?
Answer:
0.000019952mol/dm3
Explanation:
pH=-log(H+)
4.7= -log(H+)
log(H+)=-4.7
(H+)=10*-4.7=0.000019952
A chemist divides a large sample of a mixture into three smaller portions. each of these portions contains different ratios of the component substances that make up the mixture. which description best fits the mixture? a. compound b. element c. heterogeneous mixture d. homogeneous mixture e. pure substance
A heterogeneous mixture is not uniform in composition. Hence, option C is correct.
What is a heterogeneous mixture?A heterogeneous mixture is a mixture in which the composition is not uniform throughout the mixture.
This substance is not an element or compound, because different components could be observed in the substance.
A pure substance is made up of only one type of atom (element) or only one type of molecule (compound), mixtures and solutions are made from two or more types of pure substances.
For example, aluminium is an element and ammonia is a compound.
This substance is not a homogeneous mixture, because different samples of the substance appeared to have different proportions of the components.
Hence, this substance is a heterogeneous mixture.
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Answer:
heterogeneous mixture
Explanation:
increasing the airplane's speed or wing size does which of the following
a) decreases the amount of drag on the plane
b) increases the gravitational pull on the pane
c) generates more lifting force
d) creates a sonic boom
Answer:
increases the gravitional pull on tge pane
Answer:
generates more lifting on the plane
Explanation:
in chemistry what is Faraday's law
Answer:
Faraday’s – First Law of Electrolysis
It is one of the primary laws of electrolysis. It states, during electrolysis, the amount of chemical reaction which occurs at any electrode under the influence of electrical energy is proportional to the quantity of electricity passed through the electrolyte.
Faraday’s – Second Law of Electrolysis
Faraday’s second law of electrolysis states that if the same amount of electricity is passed through different electrolytes, the masses of ions deposited at the electrodes are directly proportional to their chemical equivalents.
From these laws of electrolysis, we can deduce that the amount of electricity needed for oxidation-reduction depends on the stoichiometry of the electrode reaction.
The product of an electrolytic reaction depends on the nature of the material being electrolysed and the type of electrodes used. In the case of an inert electrode such as platinum or gold, the electrode does not participate in the chemical reaction and acts only as a source or sink for electrons. While, in the case of a reactive electrode, the electrode participates in the reaction.
Hence, different products are obtained for electrolysis in the case of reactive and inert electrodes. Oxidizing and reducing species present in the electrolytic cell and their standard electrode potential too, affect the products of electrolysis.
FAQs
1. What’s a Faraday?
Ans: The Faraday is an electric charge volume unit without measurements, equal to approximately 6.02 x 10 23 electric charge carriers.
2. Why is Faraday’s law important?
A shifting magnetic flux creates an electric field, according to Faraday’s law. Faraday’s law is particularly important since it addresses the connection of the E-field and the B-field and understands that this connection necessitates flux fluctuation over time.
3. How does electrolysis remove rust?
Ans: Electrolysis is a method of removing iron oxide by passing a small electrical charge through the rusty metal from a battery or battery charger to induce ion exchange while the device is submerged in an electrolyte solution.
4. What happens to water during electrolysis?
Ans: Water’s Electrolysis. By passing an electrical current through it, water can be decomposed. When this happens, an oxidation-reduction reaction is caused by the electrons from the electric current.
5. What is the negative electrode called in electrolysis?
Ans: Through electrolysis, the negatively charged electrode is called the cathode. The positively charged electrode is called the anode in electrolysis. Negatively charged ions are moving towards the anode.
Hope it helps!
Answer:
Faraday's law states that the absolute value or magnitude of the circulation of the electric field E around a closed loop is equal to the rate of change of the magnetic flux through the area enclosed by the loop.
Explanation:
Hope It Helps!!!
Based on the equation, how many grams of Br2 are required to react completely with 42.3 grams of AlCl3?
2AlCl3 + 3Br2 → 2AlBr3 + 3Cl2
66.5 grams
71.2 grams
76.1 grams
80.2 grams
Answer:
C.) 76.1 grams
Explanation:
To find the mass of bromine, you need to (1) convert grams AlCl₃ to moles AlCl₃ (via molar mass), then (2) convert moles AlCl₃ to moles Br₂ (via mole-to-mole ratio from reaction coefficients), and then (3) convert moles Br₂ to grams Br₂ (via molar mass). It is important to arrange your ratios/conversions in a way that allows for the cancellation of units (the desired unit should be in the numerator).
Molar Mass (AlCl₃): 26.982 g/mol + 3(35.453 g/mol)
Molar Mass (AlCl₃): 133.332 g/mol
2 AlCl₃ + 3 Br₂ --> 2 AlBr₃ + 3 Cl₂
Molar Mass (Br₂): 2(79.904 g/mol)
Molar Mass (Br₂): 159.808 g/mol
42.3 g AlCl₃ 1 mole 3 moles Br₂ 159.808 g
------------------ x ----------------- x ---------------------- x ------------------- =
133.332 g 2 moles AlCl₃ 1 mole
= 76.0 g Br₂
*Our answers are slightly different most likely because we used slightly different molar masses*
