Question 1

Which of the following best defines an ionic bond?

Accepted Answer

A bond formed by the transfer of electrons from a metal to a nonmetal, resulting in oppositely charged ions held together by electrostatic attraction.

Question 2

What is the correct name for the compound with the formula $$\mathrm{$$FeCl_3$$}$$?

Accepted Answer

Iron(III) chloride

Question 3

Given the ions $$\mathrm{Ca$$^{2+}$$}$$ and $$\mathrm{NO_3$^-}$$, what is the correct formula for the resulting ionic compound?

Accepted Answer

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

Question 4

Which of the following compounds is insoluble in water and would form a precipitate in a double replacement reaction?

Accepted Answer

$$\mathrm{AgCl}$$

Question 5

What is the total number of valence electrons in a molecule of $$\mathrm{CO_2$}$$?

Accepted Answer

24

Question 6

Which of the following is the correct Lewis structure for $$\mathrm{NH_3$} ($$ammonia)?

Accepted Answer

Nitrogen with three single bonds to hydrogen and one lone pair on nitrogen.

Question 7

What is the IUPAC name for the compound $$\mathrm{C_4H_{10}}$$?

Accepted Answer

Butane

Question 8

How many moles are in $$1.20 	imes 10$$^{24}$$ molecules of $$\mathrm{H_2O}$$? ($$\mathrm{N_A = 6.022 	imes $$10^{23}$$\ $$mol^{-1}$$}$$)

Accepted Answer

$$2.00$$ moles

Question 9

Which of the following best describes a tetrahedral electron geometry?

Accepted Answer

Four charge clouds arranged around a central atom with bond angles of approximately $$109.5^\circ.$$

Question 10

Which of the following statements about electronegativity is correct?

Accepted Answer

Electronegativity increases from left to right across a period and decreases down a group.

Question 11

Which of the following molecules is nonpolar?

Accepted Answer

$$\mathrm{CO_2$}$$

Question 12

What is the molar mass of $$\mathrm{C_2H_6O} ($$ethanol)? (C: 12.01 g/mol, H: 1.01 g/mol, O: 16.00 g/mol)

Accepted Answer

46.08 g/mol

Question 13

Which of the following is a correct IUPAC name for a straight-chain alkane with a methyl group on the second carbon of butane?

Accepted Answer

2-Methylbutane

Question 14

Which functional group is present in the compound $$\mathrm{CH_3COOH}$$?

Accepted Answer

Carboxylic acid

Question 15

Given the Lewis structure for $$\mathrm{H_2O}$$, how many bonding and nonbonding electron pairs are on the central atom?

Accepted Answer

2 bonding pairs, 2 nonbonding pairs

Question 16

Which of the following best describes a charge cloud in VSEPR theory?

Accepted Answer

A region of space where electrons are likely to be found, including both bonding and nonbonding pairs.

Question 17

Which of the following is the correct formula for dinitrogen tetroxide?

Accepted Answer

$$\mathrm{N_2O_4}$$

Question 18

Which of the following best describes the difference between a polar covalent bond and a nonpolar covalent bond?

Accepted Answer

A polar covalent bond has unequal sharing of electrons due to a difference in electronegativity, while a nonpolar covalent bond has equal sharing of electrons.

Question 19

Which of the following is the correct condensed structure for 2-methylpropane?

Accepted Answer

$$\mathrm{(CH_3$)_2CHCH_3}$$

Question 20

Which of the following is a hydrocarbon?

Accepted Answer

Cyclohexane

GOB Chemistry Study Guide: Ionic and Covalent Compounds, Molecular Structure, and Organic Nomenclature

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