Question 1

Which of the following best describes the difference between an ionic solid and a molecular solid, as shown in the first image?

Accepted Answer

Ionic solids are composed of ions held together by strong electrostatic interactions, while molecular solids are composed of molecules held together by weak intermolecular forces.

Question 2

Given the formula $(NH_4)_2SO_4$, how many hydrogen atoms are present in three formula units?

Accepted Answer

$24$

Question 3

Which of the following compounds is a binary molecular compound?

Accepted Answer

CO$_2$

Question 4

What is the correct name for the compound FeCl$_3$?

Accepted Answer

Iron (III) chloride

Question 5

Which of the following formulas represents a compound containing a polyatomic ion?

Accepted Answer

K$_2$SO$_4$

Question 6

How many total oxygen atoms are present in two formula units of Cu(NO$_3$)$_2$?

Accepted Answer

$12$

Question 7

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

Accepted Answer

$(NH_4)_3PO_4$

Question 8

A compound is named dinitrogen pentoxide. What is its chemical formula?

Accepted Answer

N$_2$O$_5$

Question 9

Which of the following best explains why ionic compounds tend to have higher melting points than molecular compounds?

Accepted Answer

Ionic compounds have stronger electrostatic attractions between ions.

Question 10

What is the correct name for H$_2$SO$_4$?

Accepted Answer

Sulfuric acid

Question 11

Which of the following is the correct formula for perbromic acid?

Accepted Answer

HBrO$_4$

Question 12

If a compound contains only two elements and starts with a metal, which type of compound is it most likely to be?

Accepted Answer

Binary ionic compound

Question 13

Which of the following is the correct name for Na$_2$CO$_3$?

Accepted Answer

Sodium carbonate

Question 14

What is the charge on the phosphate ion in PO$_4$?

Accepted Answer

$-3$

Question 15

Which of the following is the correct formula for copper (I) sulfate?

Accepted Answer

Cu$_2$SO$_4$

Question 16

Which of the following acids is correctly paired with its formula?

Accepted Answer

Hydrobromic acid — HBr

Question 17

How many total atoms are present in one formula unit of Ca(NO$_3$)$_2$?

Accepted Answer

$11$

Question 18

Which of the following is the correct name for the compound N$_2$O$_7$?

Accepted Answer

Dinitrogen heptoxide

Question 19

Which of the following is a property of molecular solids but NOT ionic solids?

Accepted Answer

They are composed of discrete molecules held together by weak intermolecular forces.

Question 20

What is the correct formula for tricarbon octahydride?

Accepted Answer

C$_3$H$_8$

Molecules and Compounds: Structure, Types, and Nomenclature

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