UCSB CHEM 6AL FINAL 2026 FINAL
PAPER PRACTICE QUESTIONS
ANSWERS ACCURATE A+
◉ What is latent heat of condensation?
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, __________.
Answer: the higher the temperature
◉ Why do water molecules tend to stick to each other to form a liquid?
Answer: The exposed charge on hydrogen's protons are attracted to
unshared electron pairs on oxygen atoms.
◉ 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?
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?
, Answer: 0.369
◉ What type of reaction is shown in the graph, and why?
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?
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.
Answer: The rate of the forward reaction is at its maximum when the
reaction first starts.
The rate of the reverse reaction increases as hydrogen gas accumulates.
◉ Magnesium metal reacts with oxygen according to the equation:Mg(s)
+ O22(g) → 2MgO22(s)
Which of the following would increase the rate of the reaction?
Answer: grinding the magnesium metal into a fine powder
PAPER PRACTICE QUESTIONS
ANSWERS ACCURATE A+
◉ What is latent heat of condensation?
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, __________.
Answer: the higher the temperature
◉ Why do water molecules tend to stick to each other to form a liquid?
Answer: The exposed charge on hydrogen's protons are attracted to
unshared electron pairs on oxygen atoms.
◉ 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?
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?
, Answer: 0.369
◉ What type of reaction is shown in the graph, and why?
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?
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.
Answer: The rate of the forward reaction is at its maximum when the
reaction first starts.
The rate of the reverse reaction increases as hydrogen gas accumulates.
◉ Magnesium metal reacts with oxygen according to the equation:Mg(s)
+ O22(g) → 2MgO22(s)
Which of the following would increase the rate of the reaction?
Answer: grinding the magnesium metal into a fine powder
