$24.31\ +\ 2\times35.45\ =\ 95.21\ \mathrm{amu}$

$2.00\ \text{mol}\ \times\ (2\times1.01\ +\ 32.07\ +\ 4\times16.00)\ \text{g/mol}\ =\ 2.00\ \times\ 98.09\ =\ 196.18\ \text{g}$

Question 1

Which of the following is the correct name for the compound CO$_2$?

Accepted Answer

Carbon dioxide

Question 2

What is the correct formula for sulfur hexafluoride?

Accepted Answer

SF$_6$

Question 3

Which prefix is used to indicate five atoms of an element in a molecular compound?

Accepted Answer

penta-

Question 4

What is the correct name for the acid HCl(aq)?

Accepted Answer

Hydrochloric acid

Question 5

Which of the following acids contains an oxyanion ending in -ate?

Accepted Answer

Nitric acid

Question 6

Given the formula H$_2$SO$_3$, what is the correct name for this acid?

Accepted Answer

Sulfurous acid

Question 7

What is the formula mass of MgCl$_2$? (Mg: 24.31 amu, Cl: 35.45 amu)

Accepted Answer

$24.31\ +\ 2	imes35.45\ =\ 95.21\ \mathrm{amu}$

Question 8

Which of the following is a binary acid?

Accepted Answer

Hydrobromic acid (HBr)

Question 9

What is the correct name for the compound N$_2$O$_5$?

Accepted Answer

Dinitrogen pentoxide

Question 10

Which acid is formed when the oxyanion is acetate (C$_2$H$_3$O$_2^-$)?

Accepted Answer

Acetic acid

Question 11

A patient is exposed to H$_2$SO$_4$ in a laboratory accident. What is the name of this acid and which oxyanion does it contain?

Accepted Answer

Sulfuric acid; sulfate

Question 12

Which of the following is the correct name for ClO$_2^-$?

Accepted Answer

Chlorite

Question 13

If a compound contains two nitrogen atoms and three oxygen atoms, what is its correct name?

Accepted Answer

Dinitrogen trioxide

Question 14

Which of the following is the correct formula for carbon tetrachloride?

Accepted Answer

CCl$_4$

Question 15

What is the correct name for HNO$_2$?

Accepted Answer

Nitrous acid

Question 16

Which of the following is true about the naming of binary molecular compounds?

Accepted Answer

The prefix mono- is omitted for the first element.

Question 17

A sample contains 2.00 moles of H$_2$SO$_4$. What is the total mass of the sample? (H: 1.01 amu, S: 32.07 amu, O: 16.00 amu)

Accepted Answer

$2.00\ 	ext{mol}\ 	imes\ (2	imes1.01\ +\ 32.07\ +\ 4	imes16.00)\ 	ext{g/mol}\ =\ 2.00\ 	imes\ 98.09\ =\ 196.18\ 	ext{g}$

Question 18

Which acid is correctly named according to the rules for oxyacids with an -ite ending?

Accepted Answer

HClO$_2$ is chlorous acid

Question 19

Which of the following compounds is NOT a molecular compound?

Accepted Answer

Calcium fluoride (CaF$_2$)

Question 20

A student mixes HNO$_3$ with water. Which ions are present in the solution?

Accepted Answer

H$^+$ and NO$_3^-$

Naming Molecular Compounds, Acids, and Calculating Formula Mass

Study Guide - Practice Questions