Question 1

Which of the following is the correct formula for ammonium sulfate?

Accepted Answer

$\mathrm{(NH_4)_2SO_4}$

Question 2

A compound contains 40.0% sulfur, 60.0% oxygen by mass. What is the empirical formula of this compound?

Accepted Answer

$\mathrm{SO_2}$

Question 3

Which of the following ions is NOT a polyatomic ion?

Accepted Answer

$\mathrm{Cl^-}$

Question 4

What is the correct name for $\mathrm{K_2Cr_2O_7}$?

Accepted Answer

Potassium dichromate

Question 5

Which of the following compounds contains the perchlorate ion?

Accepted Answer

$\mathrm{NaClO_4}$

Question 6

What is the correct formula for calcium phosphate?

Accepted Answer

$\mathrm{Ca_3(PO_4)_2}$

Question 7

Which of the following is the correct name for $\mathrm{Na_2SO_3}$?

Accepted Answer

Sodium sulfite

Question 8

A solution contains $\mathrm{0.50\,mol}$ of $\mathrm{Na_2CO_3}$. How many formula units are present in the solution? (Avogadro’s number $= 6.022 	imes 10^{23}$)

Accepted Answer

$1.20 	imes 10^{24}$

Question 9

Which of the following is the correct formula for ammonium dichromate?

Accepted Answer

$\mathrm{(NH_4)_2Cr_2O_7}$

Question 10

Which of the following ions has a $2-$ charge?

Accepted Answer

$\mathrm{CO_3^{2-}}$

Question 11

What is the correct name for $\mathrm{H_2SO_3}$?

Accepted Answer

Sulfurous acid

Question 12

Which of the following is the correct formula for sodium hydrogen carbonate?

Accepted Answer

$\mathrm{NaHCO_3}$

Question 13

Which of the following is a correct pairing of polyatomic ion and its charge?

Accepted Answer

Phosphate, $3-$

Question 14

Which of the following compounds contains the chromate ion?

Accepted Answer

$\mathrm{K_2CrO_4}$

Question 15

What is the correct name for $\mathrm{Ca(ClO_3)_2}$?

Accepted Answer

Calcium chlorate

Question 16

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

Accepted Answer

$\mathrm{HPO_4^{2-}}$

Question 17

A sample contains $2.00$ moles of ammonium ions. How many ammonium ions are present?

Accepted Answer

$1.20 	imes 10^{24}$

Question 18

Which of the following is the correct formula for sodium acetate?

Accepted Answer

$\mathrm{CH_3COONa}$

Question 19

Which of the following is the correct name for $\mathrm{Na_2SO_4}$?

Accepted Answer

Sodium sulfate

Question 20

Which of the following is the correct formula for the peroxide ion?

Accepted Answer

$\mathrm{O_2^{2-}}$

General Chemistry Study Guide: Atoms, Elements, Molecules, and Compounds

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