Question 1

Which of the following best describes a covalent bond?

Accepted Answer

A bond formed by the sharing of electrons between two nonmetal atoms.

Question 2

What is the empirical formula for a compound containing 81.05% C and 8.162% H, with the remainder being oxygen?

Accepted Answer

$$\mathrm{C}_6\mathrm{H}_8\mathrm{O}_2$$

Question 3

Which of the following is the correct IUPAC name for $$\mathrm{FeSO}_4$$?

Accepted Answer

Iron(II) sulfate

Question 4

A sample contains 325 mg of acetylsalicylic acid ($$\mathrm{C}_9\mathrm{H}_8\mathrm{O}_4). $$How many moles of acetylsalicylic acid does it contain?

Accepted Answer

$$1.80 	imes 10$$^{-3}$$ mol

Question 5

Which of the following compounds is named correctly according to IUPAC rules?

Accepted Answer

CaCO$$_3$$ – Calcium carbonate

Question 6

What is the mass percent of chlorine in $$\mathrm{CCl}_2\mathrm{F}_2$$? (Molar mass = 120.91 g/mol, Cl = 35.45 g/mol)

Accepted Answer

58.64%

Question 7

Which formula represents a compound with the smallest whole-number ratio of atoms?

Accepted Answer

Empirical formula

Question 8

How many moles of Cl are present in 38.5 mol of $$\mathrm{CCl}_2\mathrm{F}_2$$?

Accepted Answer

77.0 mol

Question 9

Which of the following is the correct name for $$\mathrm{CuSO}_4 \cdot 5\mathrm{H}_2\mathrm{O}$$?

Accepted Answer

Copper(II) sulfate pentahydrate

Question 10

What is the correct molecular formula for a compound with an empirical formula of $$\mathrm{CH}_2\mathrm{O}$$ and a molar mass of 180.16 g/mol?

Accepted Answer

$$\mathrm{C}_6\mathrm{H}_{12}\mathrm{O}_6$$

Question 11

Which of the following is the correct name for $$\mathrm{N}_2\mathrm{O}_5$$?

Accepted Answer

Dinitrogen pentoxide

Question 12

What is the correct name for $$\mathrm{H}_2\mathrm{SO}_4$$?

Accepted Answer

Sulfuric acid

Question 13

Which of the following is a hydrocarbon containing only single bonds?

Accepted Answer

Alkane

Question 14

What is the correct IUPAC name for the following structure: $$\mathrm{CH}_3-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{CH}_3$$?

Accepted Answer

Butane

Question 15

Which of the following is the correct name for $$\mathrm{K}_2\mathrm{CO}_3$$?

Accepted Answer

Potassium carbonate

Question 16

A compound is found to contain 40.0% C, 6.7% H, and 53.3% O by mass. What is its empirical formula?

Accepted Answer

$$\mathrm{CH}_2\mathrm{O}$$

Question 17

Which of the following is the correct name for $$\mathrm{NH}_4\mathrm{NO}_3$$?

Accepted Answer

Ammonium nitrate

Question 18

What is the correct name for $$\mathrm{C}_6\mathrm{H}_6$$?

Accepted Answer

Benzene

Question 19

Which of the following is the correct name for $$\mathrm{CaSO}_4 \cdot 0.5\mathrm{H}_2\mathrm{O}$$?

Accepted Answer

Calcium sulfate hemihydrate

Question 20

Which of the following is the correct name for $$\mathrm{NO}_2$$?

Accepted Answer

Nitrogen dioxide

Molecules, Compounds, and Nomenclature: Study Notes

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