$$\mathrm{C=O}$$\text{ (carbonyl group attached to two carbons)}$$

Question 1

Which of the following best describes a structural formula in chemistry?

Accepted Answer

A formula that shows the arrangement of atoms and the bonds between them in a molecule.

Question 2

Which of the following is the correct molecular formula for glucose?

Accepted Answer

$$\mathrm{C_6H_{12}O_6$}$$

Question 3

Which of the following representations provides the most information about the three-dimensional arrangement of atoms in a molecule?

Accepted Answer

Ball-and-stick model

Question 4

What is the correct IUPAC name for the compound with the formula $$\mathrm{N_2O_5}$$?

Accepted Answer

Dinitrogen pentoxide

Question 5

Which of the following is a correct condensed structural formula for propane?

Accepted Answer

$$\mathrm{CH_3CH_2CH_3}$$

Question 6

Which of the following best describes a functional group in organic chemistry?

Accepted Answer

A group of atoms responsible for the characteristic reactions of a compound.

Question 7

Which of the following is the correct formula for sodium sulfate?

Accepted Answer

$$\mathrm{Na_2SO_4}$$

Question 8

A molecule has the formula $$\mathrm{C_3H_8O}. $$Which of the following could be its correct condensed structural formula?

Accepted Answer

$$\mathrm{CH_3CH_2CH_2OH}$$

Question 9

Which of the following is the correct name for the compound $$\mathrm{$$COCl_2$$}$$?

Accepted Answer

Carbonyl chloride

Question 10

Which of the following is a correct line structure for butane?

Accepted Answer

A zig-zag line with four carbon atoms in a row

Question 11

Which of the following is the correct formula for ammonium sulfate?

Accepted Answer

$$\mathrm{(NH_4$)_2SO_4}$$

Question 12

Which of the following best describes the difference between an empirical formula and a molecular formula?

Accepted Answer

An empirical formula shows the simplest whole-number ratio of atoms, while a molecular formula shows the actual number of atoms in a molecule.

Question 13

Which of the following is the correct IUPAC name for $$\mathrm{N_2O_4}$$?

Accepted Answer

Dinitrogen tetroxide

Question 14

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

Accepted Answer

$$\mathrm{(CH_3$)_3CH}$$

Question 15

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

Accepted Answer

$$\mathrm{Ca_3$(PO_4$)_2}$$

Question 16

Which of the following is a correct representation of a ketone functional group?

Accepted Answer

$$\mathrm{C=O}$$	ext{ (carbonyl group attached to two carbons)}$$

Question 17

Which of the following is the correct IUPAC name for $$\mathrm{C_2H_6}$$?

Accepted Answer

Ethane

Question 18

Which of the following is the correct formula for the acetate ion?

Accepted Answer

$$\mathrm{CH_3COO^-}$$

Question 19

Which of the following best describes a space-filling model?

Accepted Answer

A model that shows the relative sizes of atoms and their spatial arrangement in a molecule.

The Language of Chemistry: Representations and Nomenclature

Study Guide - Practice Questions