Question 1

Which of the following is the correct balanced chemical equation for the reaction between aqueous lead(II) nitrate and copper(II) chloride?

Accepted Answer

$$\mathrm{Pb(NO_3$)_2 (aq) + $$CuCl_2$$ (aq) \rightarrow $$PbCl_2$$ (s) + Cu(NO_3$)_2 (aq)}$$

Question 2

A student heats copper(II) carbonate. What type of chemical reaction is this?

Accepted Answer

Decomposition

Question 3

Which of the following is the correct formula for the ideal gas law?

Accepted Answer

$$PV = nRT$$

Question 4

At STP, what is the volume occupied by 1 mole of an ideal gas?

Accepted Answer

$$22.4\ \mathrm{L}$$

Question 5

A solution contains 3.2 g of glucose ($$C_6H_{12}O_6$) in 250 mL of solution. What is the molarity of the solution? (Molar mass of glucose = 180 g/mol)

Accepted Answer

$$0.071\ \mathrm{M}$$

Question 6

Which of the following is a Brønsted-Lowry acid?

Accepted Answer

$$NH_4$$^+$$

Question 7

What is the conjugate acid of $$NH_3$$?

Accepted Answer

$$NH_4$$^+$$

Question 8

A titration is done to find the molarity of a sulfuric acid solution. The starting volume of acid is 20.0 mL and it takes 25.8 mL of 2.5 M potassium hydroxide solution to reach the end point. What is the acid's molarity? ($$H_2SO_4 + 2KOH \rightarrow K_2SO_4 + 2H_2O)$$

Accepted Answer

$$1.61\ \mathrm{M}$$

Question 9

If the $$[H^+] in a $$solution is $$1.5 	imes 10$$^{-6}$$, what is the pH?

Accepted Answer

$$5.82$$

Question 10

A sample of gas has a volume of 25 mL at 19°C and 1.45 atm. How many moles of gas are present? ($$R = 0.08206\ \mathrm{L\cdot atm\cdot $$mol^{-1}$$\cdot K$$^{-1}$$})$$

Accepted Answer

$$0.0012\ \mathrm{mol}$$

Question 11

Which of the following best describes the Kinetic-Molecular Theory of Gases?

Accepted Answer

Gas particles are in constant, random motion and collisions are perfectly elastic.

Question 12

A Styrofoam cup calorimeter contains 58.5 mL of water at 22°C. An 18.5 g block of copper metal at 99.5°C is placed in the water. The final temperature is 26.1°C. What is the specific heat of copper in J/g°C? ($$q_{water} = m$$_{water}$$c_{water}\Delta T$$; $$c_{water} = 4.18\ \mathrm{J/g\cdot °C})$$

Accepted Answer

$$0.38\ \mathrm{J/g\cdot °C}$$

Question 13

Which of the following is the correct net ionic equation for the reaction between $$Ba(OH)_2$$ and $$HNO_3$$?

Accepted Answer

$$2OH^- (aq) + 2H^+ (aq) \rightarrow 2H_2O (l)$$

Question 14

Which of the following statements about exothermic reactions is correct?

Accepted Answer

Exothermic reactions release energy to the surroundings, resulting in a negative $$\Delta H.$$

Question 15

A 0.32 g sample of magnesium reacts with excess HCl to produce hydrogen gas. What volume of $$H_2$$ gas is produced at 20°C and 1.2 atm? ($$R = 0.08206\ \mathrm{L\cdot atm\cdot $$mol^{-1}$$\cdot K$$^{-1}$$}$$, molar mass of Mg = 24.305 g/mol)

Accepted Answer

$$0.26\ \mathrm{L}$$

Question 16

Which of the following is NOT a property of acids?

Accepted Answer

They feel slippery to the touch.

Question 17

Which gas law describes the relationship between pressure and volume at constant temperature?

Accepted Answer

Boyle's Law: $$P_1V_1 = P_2V_2$$

Question 18

Which of the following is the correct definition of STP (Standard Temperature and Pressure)?

Accepted Answer

0°C and 1 atm

Question 19

Which of the following is the correct formula for calculating the heat absorbed or released by a substance?

Accepted Answer

$$q = mc\Delta T$$

General Chemistry Study Guide: Chemical Reactions, Stoichiometry, Solutions, and Gas Laws

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