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CHEMISTRY B- FINAL EXAM QUESTIONS
AND ANSWERS 2025
What happens when there is an increase in temperature for a
reaction rate?
Select all that apply. - correct answer- It increases the total
number of molecular collisions that occur
It increases the percentage of collisions that result in a reaction
What is latent heat of condensation? - correct answer- the
amount of heat released when a certain mass of a substance
changes from a gas to a liquid
The greater the average kinetic energy of the particles in a
sample of matter, __________. - correct answer- the higher the
temperature
Why do water molecules tend to stick to each other to form a
liquid? - correct answer- The exposed charge on hydrogen's
protons are attracted to unshared electron pairs on oxygen
atoms.
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A solution is formed by dissolving 83.2 grams of copper II
chloride (CuCl22) in 2.5 liters of water. The molar mass of
CuCl22 is 134.45 g/mol.
What is the molarity of the solution? - correct answer- 0.25
A mixture consists of 45% oxygen, 12% argon, and 43%
nitrogen by volume. A sample of this mixture has a pressure of
2.0 atm in a 5.3 L container at 350 K temperature. How many
moles of gas are in the container? - correct answer- 0.369
What type of reaction is shown in the graph, and why? - correct
answer- Exothermic: Energy is released to the environment
during the formation of the products.
Examine the image, which shows four chemical systems of
colliding molecules. Which chemical system has the highest
reaction rate? - correct answer- D
Study the following equation.Fe(s) + 2 HCl(aq) ⇌ H22(g) +
FeCl22(aq)
What happens to the iron metal when it is reacted in a closed
container to produce hydrogen gas in this manner?
Select all that apply. - correct answer- The rate of the forward
reaction is at its maximum when the reaction first starts.
CHEMISTRY B- FINAL EXAM QUESTIONS
AND ANSWERS 2025
What happens when there is an increase in temperature for a
reaction rate?
Select all that apply. - correct answer- It increases the total
number of molecular collisions that occur
It increases the percentage of collisions that result in a reaction
What is latent heat of condensation? - correct answer- the
amount of heat released when a certain mass of a substance
changes from a gas to a liquid
The greater the average kinetic energy of the particles in a
sample of matter, __________. - correct answer- the higher the
temperature
Why do water molecules tend to stick to each other to form a
liquid? - correct answer- The exposed charge on hydrogen's
protons are attracted to unshared electron pairs on oxygen
atoms.
, 2 | Page
A solution is formed by dissolving 83.2 grams of copper II
chloride (CuCl22) in 2.5 liters of water. The molar mass of
CuCl22 is 134.45 g/mol.
What is the molarity of the solution? - correct answer- 0.25
A mixture consists of 45% oxygen, 12% argon, and 43%
nitrogen by volume. A sample of this mixture has a pressure of
2.0 atm in a 5.3 L container at 350 K temperature. How many
moles of gas are in the container? - correct answer- 0.369
What type of reaction is shown in the graph, and why? - correct
answer- Exothermic: Energy is released to the environment
during the formation of the products.
Examine the image, which shows four chemical systems of
colliding molecules. Which chemical system has the highest
reaction rate? - correct answer- D
Study the following equation.Fe(s) + 2 HCl(aq) ⇌ H22(g) +
FeCl22(aq)
What happens to the iron metal when it is reacted in a closed
container to produce hydrogen gas in this manner?
Select all that apply. - correct answer- The rate of the forward
reaction is at its maximum when the reaction first starts.
