Advanced Chem CBA 2 Review

• 121.95 K

• 24.36 K

• 243.6 K

• 488.20 K

Answer explanation

Using the ideal gas law, we can rearrange the formula to solve for temperature: T = (PV) / (nR). Plugging in the values, we get T = (2 atm * 2 L) / (0.2 mol * 0.0821 L*atm/mol*K) = 243.6 K.

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DOK Level 2: Skill/Concept

What is the molarity of a solution prepared by dissolving 58.5 grams of NaCl in enough water to make 0.5 liters of solution? (Molar mass of NaCl = 58.5 g/mol).

• 0.5 M

• 1.0 M

• 2.0 M

• 4.0 M

Answer explanation

To find the molarity, first calculate the moles of NaCl: 58.5g / 58.5 g/mol = 1 mol. Then, divide moles by liters of solution: 1 mol / 0.5 L = 2.0 M.

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DOK Level 2: Skill/Concept

What is the Bronsted-Lowry definition of an acid?

• A proton (H⁺) donor

• A proton (H⁺) acceptor

• A hydroxide (OH^-) donor

• A hydroxide (OH^-) acceptor

Answer explanation

The Bronsted-Lowry definition of an acid is a proton (H⁺) donor, making the correct answer choice A.

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DOK Level 2: Skill/Concept

• 14

• 11

• 3

• 7

Answer explanation

The pH of a solution is calculated using the formula pH = -log[H+]. Therefore, pH = -log(1 x 10^-3) = 3. Hence, the correct answer is 3.

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DOK Level 2: Skill/Concept

• It doubles

• It is halved

• It remains the same

• It quadruples

Answer explanation

According to Boyle's Law, if the volume of a gas is doubled while holding temperature constant, the pressure of the gas is halved (inverse relationship).

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DOK Level 2: Skill/Concept

What is the new concentration of a solution that was originally 1.5 M and had a volume of 2 liters, after it has been diluted to a total volume of 6 liters?

• 3.0 M

• 0.25 M

• 1.0 M

• 0.5 M

Answer explanation

To find the new concentration after dilution, use the formula C1V1 = C2V2. Given C1=1.5 M, V1=2 L, V2=6 L, solving for C2 gives C2 = (C1V1)/V2 = (1.5*2)/6 = 0.5 M.

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DOK Level 2: Skill/Concept

If the pressure on a gas is increased from 1 atm to 4 atm, what happens to the volume of the gas if the temperature remains constant?

• It doubles

• It is halved

• It is quartered

• It remains the same

Answer explanation

When pressure increases, volume decreases proportionally (Boyle's Law). So, if pressure quadruples, volume is quartered.

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DOK Level 2: Skill/Concept

• 4

• 10

• 7

• 14

Answer explanation

The pH of a solution can be calculated using the formula pH = -log[H+]. Since [OH-] = 1e-4 M, [H+] = 1e-14/1e-4 = 1e-10 M. Therefore, pH = -log(1e-10) = 10.

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DOK Level 2: Skill/Concept

• 1 mole

• 2 moles

• 4 moles

• 8 moles

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DOK Level 2: Skill/Concept

If the temperature of a gas increases from 300 K to 600 K, what happens to the pressure of the gas if the volume remains constant?

• It doubles

• It is halved

• It remains the same

• It quadruples

Answer explanation

When the temperature of a gas increases at constant volume, the pressure is directly proportional to the temperature, so it doubles in this case.

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DOK Level 2: Skill/Concept