HW: 10.45

A molecule of which compound contains an atom of nitrogen?

• 2-chloropropane

• 1-propanol

• 2-pentanone

• 1-propanamine

Answer explanation

1-propanamine contains a nitrogen atom in its structure, as it is an amine. The other compounds listed (2-chloropropane, 1-propanol, and 2-pentanone) do not contain nitrogen.

Tags

NGSS.HS-LS1-6

Based on Table R, which functional group allows a compound to be classified as an organic acid?

• 1

• 2

• 3

• 4

Answer explanation

A compound is classified as an organic acid if it contains a carboxyl group (-COOH), which corresponds to choice 3. This functional group is responsible for the acidic properties of organic acids.

What is a chemical name of this compound?

• 1,1-dibromopentane

• 2,2-dibromopentane

• 1,2-dibromopentane

• 4,5-dibromopentane

Answer explanation

The correct choice is 1,2-dibromopentane because it indicates bromine substituents at the first and second carbon atoms of the pentane chain, which is consistent with the compound's structure.

An atom of which element is bonded to the carbon atom in the amide functional group?

• iodine

• nitrogen

• phosphorus

• sulfur

Answer explanation

In the amide functional group, the carbon atom is bonded to a nitrogen atom. This is a defining characteristic of amides, distinguishing them from other functional groups.

Tags

NGSS.HS-LS1-6

Which compound has a functional group that contains two oxygen atoms?

• 1-propanamine

• 2-chloropropane

• methyl propanoate

• methyl ethyl ether

Answer explanation

Methyl propanoate contains an ester functional group, which has two oxygen atoms. The other compounds either have no oxygen or only one oxygen in their functional groups.

Given the formula representing a compound: This compound is classified as an

• amide

• amine

• ester

• ether

Answer explanation

The compound is classified as an amide because it contains a carbonyl group (C=O) directly attached to a nitrogen atom (N). This structure is characteristic of amides, distinguishing them from amines, esters, and ethers.

Tags

NGSS.HS-PS1-1

What is a chemical name for the compound?

• 1-butanamine

• 1-butanol

• butanamide

• butanoic acid

Answer explanation

The correct answer is butanamide, which is an amide derived from butanoic acid. 1-butanamine is an amine, 1-butanol is an alcohol, and butanoic acid is a carboxylic acid, making butanamide the only amide option.

Which class of organic compounds has molecules with this functional group?

• aldehydes

• esters

• ketones

• organic acids

Answer explanation

Aldehydes are characterized by the presence of a carbonyl group (C=O) at the end of a carbon chain. This distinguishes them from ketones, which have the carbonyl group within the chain, and other classes listed.

Tags

NGSS.HS-LS1-6

Given the formula for the compound: What is the name of this compound?

• methyl butanoate

• methyl butyl ether

• pentanone

• pentanoic acid

Answer explanation

The compound is named methyl butanoate because it is an ester formed from methanol and butanoic acid. The name reflects the structure, with 'methyl' indicating the methanol part and 'butanoate' indicating the butanoic acid part.

Tags

NGSS.HS-PS1-1

Which functional group contains a nitrogen atom and an oxygen atom?

• ester

• ether

• amide

• amine

Answer explanation

An amine is a functional group that contains a nitrogen atom (N) and can also be bonded to an oxygen atom in certain cases, such as in amides. Esters and ethers do not contain nitrogen, while amines do.