Question 1

Which quantum number determines the shape of an atomic orbital?

Accepted Answer

Angular momentum quantum number ($$l)$$

Question 2

Which of the following elements has the highest first ionization energy?

Accepted Answer

Fluorine (F)

Question 3

A sample contains 40.0 g of Na$$_2SO$_4. $$What is the number of moles present?

Accepted Answer

$$0.563$$ mol

Question 4

Which statement best explains why ionic compounds tend to have high melting points?

Accepted Answer

They have strong electrostatic attractions between oppositely charged ions.

Question 5

Which of the following is the correct balanced equation for the combustion of propane (C$$_3H$_8$$)?

Accepted Answer

$$\mathrm{C_3H_8 + 5O_2 \rightarrow 3CO_2 + 4H_2O}$$

Question 6

Which intermolecular force is primarily responsible for the high boiling point of water?

Accepted Answer

Hydrogen bonding

Question 7

A solution is prepared by dissolving 5.00 g of NaCl in enough water to make 250 mL of solution. What is the molarity of the solution?

Accepted Answer

$$0.342 M$$

Question 8

Which of the following best describes the trend in atomic radius as you move down a group in the periodic table?

Accepted Answer

Atomic radius increases due to addition of electron shells.

Question 9

What is the empirical formula of a compound containing 40.0% carbon, 6.7% hydrogen, and 53.3% oxygen by mass?

Accepted Answer

$$\mathrm{CH_2O}$$

Question 10

Which of the following is a correct statement about the solubility of ionic compounds in water?

Accepted Answer

Ionic compounds dissolve in water due to ion-dipole interactions.

Question 11

A gas occupies 2.50 L at 1.00 atm and 300 K. What will its volume be at 2.00 atm and 300 K?

Accepted Answer

$$1.25 L$$

Question 12

Which of the following is the correct net ionic equation for the reaction between Na$$_2SO$_4(aq) $$and BaCl$$_2(aq$$)?

Accepted Answer

$$\mathrm{Ba$$^{2+}$$(aq) + SO_4$^{2-}(aq) \rightarrow $$BaSO_4$$(s)}$$

Question 13

Which of the following molecules is nonpolar?

Accepted Answer

CO$$_2$$

Question 14

What is the percent yield if 5.00 g of product is obtained from a reaction with a theoretical yield of 8.00 g?

Accepted Answer

$$62.5\%$$

Question 15

Which of the following is a property of gases explained by the kinetic molecular theory?

Accepted Answer

Gas particles are in constant random motion.

Question 16

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

Accepted Answer

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

Question 17

Which of the following is a correct statement about the effect of a solute on the boiling point of a solvent?

Accepted Answer

Adding a solute increases the boiling point of the solvent.

Question 18

Which of the following is the correct condensed structural formula for ethanol?

Accepted Answer

$$\mathrm{CH_3CH_2OH}$$

Question 19

Which of the following is the correct formula for calculating percent composition by mass?

Accepted Answer

$$\mathrm{\%\,composition = \frac{mass\ of\ element}{molar\ mass\ of\ compound} 	imes 100}$$

Grade 11 Chemistry Exam Review Notes – Comprehensive Study Guide

Study Guide - Practice Questions