Question 1

Which of the following best describes the kinetic-molecular theory of gases?

Accepted Answer

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

Question 2

A student mixes 50.0 mL of 1.0 M NaCl with 50.0 mL of 1.0 M AgNO$$_3. $$What is the mass of AgCl precipitate formed? (Assume complete reaction and AgCl is insoluble.)

Relevant equation: $$\mathrm{$$AgNO_3$$ + NaCl \rightarrow AgCl(s) + $$NaNO_3$$}$$

Molar mass of AgCl = 143.4 g/mol.

Accepted Answer

3.59 g

Question 3

Which of the following is NOT a strong acid?

Accepted Answer

CH$$_3$$COOH

Question 4

A sample of gas occupies 2.0 L at 1.0 atm and 300 K. What will be its volume at 2.0 atm and 300 K?

Use the ideal gas law: $$P_1V_1 = P_2V_2$$

Accepted Answer

1.0 L

Question 5

Which statement about atomic structure is correct?

Accepted Answer

Protons and neutrons have nearly the same mass.

Question 6

Which of the following best explains why water is a polar molecule?

Accepted Answer

Oxygen is more electronegative than hydrogen, creating a dipole.

Question 7

A reaction has $$\Delta H = -100 kJ $$and $$\Delta S = +200 J/K. At $$what temperature will the reaction become non-spontaneous?

Use $$\Delta G = \Delta H - T\Delta S$$

Accepted Answer

$$T \u003e 500 K$$

Question 8

Which of the following is the correct electron configuration for a neutral atom of nitrogen (atomic number 7)?

Accepted Answer

$$1s^2$$ $$2s^2$$ $$2p^3$$

Question 9

Which of the following best describes the process of titration?

Accepted Answer

Adding a solution of known concentration to a solution of unknown concentration to determine its concentration.

Question 10

Which of the following is a consequence of the Pauli Exclusion Principle?

Accepted Answer

Electrons in the same orbital must have opposite spins.

Question 11

A 0.50 mol sample of an ideal gas is at 300 K and 1.0 atm. What is its volume?

Use $$PV = nRT$$, with $$R = 0.0821 L$$·atm/(mol·K)

Accepted Answer

Question 12

Which of the following is the correct balanced equation for the combustion of methane?

Accepted Answer

$$\mathrm{CH_4$ + 2O_2 \rightarrow CO_2$ + 2H_2O}$$

Question 13

Which of the following statements about ionic compounds is correct?

Accepted Answer

Ionic compounds have high melting points due to strong electrostatic forces.

Question 14

Which of the following is a correct statement about the periodic trends in atomic radius?

Accepted Answer

Atomic radius decreases across a period from left to right.

Question 15

Which of the following is the correct formula for calculating molarity?

Accepted Answer

$$\mathrm{M = \frac{moles\ of\ solute}{volume\ of\ solution\ (L)}}$$

Question 16

Which of the following is a correct statement about endothermic reactions?

Accepted Answer

Endothermic reactions absorb heat from the surroundings.

Question 17

A solution is prepared by dissolving 10.0 g of NaOH in enough water to make 500 mL of solution. What is the molarity of the solution?

Molar mass of NaOH = 40.0 g/mol.

Accepted Answer

0.50 M

Question 18

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

Accepted Answer

$$PV = nRT$$

Question 19

Which of the following is a correct statement about the octet rule?

Accepted Answer

Atoms tend to gain, lose, or share electrons to achieve eight electrons in their valence shell.

Question 20

Which of the following is the correct formula for calculating percent yield?

Accepted Answer

$$\mathrm{Percent\ Yield = \frac{Actual\ Yield}{Theoretical\ Yield} 	imes 100}$$

General Chemistry I Syllabus and Course Structure

Study Guide - Practice Questions

Study Guide - Flashcards