$$\text{Formal charge} = \text{valence electrons} - (\text{nonbonding electrons} + \frac{1}{2}\text{bonding electrons})$$

$$\text{pH} + \text{pOH} = 14$$

$$\text{moles} = \frac{\text{mass}}{\text{molar mass}}$$

Question 1

Which of the following molecules contains an sp$$^2$$ hybridized carbon atom?

Accepted Answer

Ethene

Question 2

A compound has the molecular formula C$$_3H$_8O. $$Which of the following is a possible structure for this compound?

Accepted Answer

CH$$_3CH$_2CH$_2OH$$

Question 3

Which of the following statements about resonance structures is TRUE?

Accepted Answer

Resonance structures differ only in the arrangement of electrons, not atoms.

Question 4

Which of the following is the correct IUPAC name for the compound CH$$_3CH$_2CH$_2CH$_2OH$$?

Accepted Answer

Butanol

Question 5

How many lone pairs of electrons are on the oxygen atom in a molecule of water (H$$_2O$$)?

Accepted Answer

2

Question 6

Which of the following is a Bronsted-Lowry acid?

Accepted Answer

HCl

Question 7

Which of the following molecules has the lowest boiling point?

Accepted Answer

CH$$_3CH$_2CH$_3$$

Question 8

Which of the following is the most stable chair conformation of methylcyclohexane?

Accepted Answer

Methyl group in the equatorial position

Question 9

Which of the following is a nucleophile?

Accepted Answer

NH$$_3$$

Question 10

Which of the following energy diagrams best represents a thermodynamically unfavorable reaction?

Accepted Answer

A diagram where the products are higher in energy than the reactants

Question 11

Which of the following molecules can act as both a Bronsted-Lowry acid and base?

Accepted Answer

H$$_2O$$

Question 12

Which of the following is the correct formula for calculating the formal charge on an atom?

Accepted Answer

$$	ext{Formal charge} = 	ext{valence electrons} - (	ext{nonbonding electrons} + \frac{1}{2}	ext{bonding electrons})$$

Question 13

Which of the following is the strongest acid?

Accepted Answer

CH$$_3$$COOH

Question 14

Which of the following molecules has the greatest number of hydrogen atoms?

Accepted Answer

C$$_2H$_6$$

Question 15

Which of the following is a correct statement about the hybridization of the carbon atom in methane (CH$$_4$$)?

Accepted Answer

The carbon atom is sp$$^3$$ hybridized

Question 16

Which of the following is the correct Lewis structure for ammonia (NH$$_3$$)?

Accepted Answer

A nitrogen atom with three single bonds to hydrogen and one lone pair

Question 17

Which of the following is the correct equation for the relationship between pH and pOH?

Accepted Answer

$$	ext{pH} + 	ext{pOH} = 14$$

Question 18

Which of the following molecules is most likely to be soluble in water?

Accepted Answer

CH$$_3CH$_2OH$$

Question 19

Which of the following is the correct formula for calculating the number of moles from mass and molar mass?

Accepted Answer

$$	ext{moles} = \frac{	ext{mass}}{	ext{molar mass}}$$

Question 20

Which of the following molecules is a saturated hydrocarbon?

Accepted Answer

Ethane

General and Organic Chemistry: Practice Exam Study Notes

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