Question 1

Which quantum number indicates the shape or type of an atomic orbital?

Accepted Answer

Angular momentum quantum number ($l$)

Question 2

Which of the following electron configurations is NOT possible for a ground-state atom?

Accepted Answer

$1s^2\ 2s^2\ 2p^6\ 3s^2\ 3p^6\ 4s^2\ 3d^{11}$

Question 3

Which of the following is a correct name for the compound $Fe_2O_3$?

Accepted Answer

Iron(III) oxide

Question 4

What is the correct formula for hydrobromic acid?

Accepted Answer

$HBr$

Question 5

Which of the following best describes a single replacement reaction?

Accepted Answer

$AB + C \rightarrow AC + B$

Question 6

A student mixes solutions of $AgNO_3$ and $NaCl$. What is the precipitate formed?

Accepted Answer

$AgCl$

Question 7

Which of the following is the correct net ionic equation for the reaction between $BaCl_2$ and $Na_2SO_4$?

Accepted Answer

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

Question 8

How many moles are in $12.0$ grams of carbon? (Atomic mass of C = $12.0$ g/mol)

Accepted Answer

$1.00$ mol

Question 9

Which of the following is a decomposition reaction?

Accepted Answer

$2H_2O_2 \rightarrow 2H_2O + O_2$

Question 10

A sample contains $3.01 	imes 10^{23}$ molecules of $CO_2$. How many moles of $CO_2$ are present?

Accepted Answer

$0.50$ mol

Question 11

Which of the following is the correct name for $N_2O_5$?

Accepted Answer

Dinitrogen pentoxide

Question 12

What is the molar mass of $H_2SO_4$?

Accepted Answer

$98.0$ g/mol

Question 13

Which of the following is a binary acid?

Accepted Answer

Hydrochloric acid

Question 14

What is the correct formula for aluminum sulfate?

Accepted Answer

$Al_2(SO_4)_3$

Question 15

Which of the following best describes the Law of Conservation of Mass?

Accepted Answer

Mass is neither created nor destroyed during a chemical reaction.

Question 16

How many atoms are in $2.5$ moles of sodium?

Accepted Answer

$1.51 	imes 10^{24}$ atoms

Question 17

Which of the following is the correct balanced equation for the reaction of iron(III) chloride with sodium hydroxide?

Accepted Answer

$FeCl_3 + 3NaOH \rightarrow Fe(OH)_3 + 3NaCl$

Question 18

A compound contains $40.0$ g of oxygen and $10.0$ g of hydrogen. What is the mass percent of hydrogen in the compound?

Accepted Answer

$20.0\%$

Question 19

Which of the following is a molecular compound?

Accepted Answer

$CO_2$

Question 20

Which of the following is the correct formula for calcium phosphate?

Accepted Answer

$Ca_3(PO_4)_2$

Introductory Chemistry Study Guide: Atomic Structure, Chemical Nomenclature, Reactions, and Mole Calculations

Study Guide - Practice Questions