Question 1

Which of the following is the correct name for the compound with the formula $$\mathrm{Fe_2$(SO_4$)_3}$$?

Accepted Answer

Iron(III) sulfate

Question 2

Which of the following compounds contains a polyatomic ion?

Accepted Answer

$$\mathrm{K_2SO_4}$$

Question 3

What is the correct formula for ammonium phosphate?

Accepted Answer

$$\mathrm{(NH_4$)_3PO_4}$$

Question 4

Which of the following best explains why covalent bonds form between two nonmetals?

Accepted Answer

Nonmetals have similar electronegativities and share electrons to achieve a stable octet.

Question 5

Which of the following is the correct Lewis structure for carbon dioxide ($$\mathrm{CO_2$}$$)?

Accepted Answer

O=C=O, with each O atom having two lone pairs

Question 6

Which of the following molecules is nonpolar, despite containing polar bonds?

Accepted Answer

$$\mathrm{CO_2$}$$

Question 7

Which of the following statements about polyatomic ions is TRUE?

Accepted Answer

Polyatomic ions are groups of atoms covalently bonded together with an overall charge.

Question 8

Which of the following best describes the geometry and bond angle of methane ($$\mathrm{CH_4$}) $$according to VSEPR theory?

Accepted Answer

Tetrahedral, $$109.5^\circ$$

Question 9

Which of the following molecules can form hydrogen bonds with water?

Accepted Answer

$$\mathrm{CH_3OH} ($$methanol)

Question 10

Which of the following is the correct balanced equation for the combustion of propane ($$\mathrm{C_3H_8}) in $$oxygen?

Accepted Answer

$$\mathrm{C_3H_8 + 5O_2 \rightarrow 3CO_2 + 4H_2O}$$

Question 11

Which of the following best describes London Dispersion Forces?

Accepted Answer

They are temporary attractions between all molecules due to momentary shifts in electron density.

Question 12

Which of the following is an organic molecule?

Accepted Answer

$$\mathrm{C_2H_6} ($$ethane)

Question 13

Which of the following best explains why water ($$\mathrm{H_2O}) $$has a higher boiling point than methane ($$\mathrm{CH_4$}$$)?

Accepted Answer

Water forms hydrogen bonds, which are stronger than the London dispersion forces in methane.

Question 14

Which of the following is the correct name for $$\mathrm{N_2O_5}$$?

Accepted Answer

Dinitrogen pentoxide

Question 15

Which of the following statements about hydrocarbons is TRUE?

Accepted Answer

Hydrocarbons are nonpolar molecules composed only of carbon and hydrogen.

Question 16

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

Accepted Answer

$$\mathrm{Ca(NO_3$)_2}$$

Question 17

Which of the following molecules is polar due to its shape, even though its bonds are polar?

Accepted Answer

$$\mathrm{H_2O}$$

Question 18

Which of the following is the strongest type of intermolecular force?

Accepted Answer

Hydrogen bonding

Question 19

Which of the following is the correct skeletal structure for butane ($$\mathrm{C_4H_{10}}$$)?

Accepted Answer

A straight chain of four connected lines (zig-zag), each end representing a carbon atom

Question 20

Which of the following is the correct balanced equation for the reaction of sodium hydroxide with sulfuric acid to produce sodium sulfate and water?

Accepted Answer

$$\mathrm{2NaOH + H_2SO_4 \rightarrow Na_2SO_4 + 2H_2O}$$

Chem 101: Ionic and Covalent Compounds, Molecular Polarity, and Chemical Reactions

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