Question 1

Which of the following best describes the difference between a mixture and a compound?

Accepted Answer

A mixture contains elements in any proportion, while a compound contains elements in fixed, definite proportions.

Question 2

Which of the following is the correct empirical formula for glucose, $$C_6H_{12}O_6$?

Accepted Answer

$$CH_2O$$

Question 3

What type of chemical bond is formed when electrons are transferred from one atom to another?

Accepted Answer

Ionic bond

Question 4

Which of the following compounds is an example of a molecular compound?

Accepted Answer

$$CO_2$$

Question 5

What is the correct name for the compound $$FeCl_3$$?

Accepted Answer

Iron(III) chloride

Question 6

Which of the following is the correct formula for magnesium sulfate heptahydrate?

Accepted Answer

$$MgSO_4$$ \cdot 7H_2O$$

Question 7

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 of each element in a molecule.

Question 8

A sample of a compound contains 40.0% carbon, 6.7% hydrogen, and 53.3% oxygen by mass. What is the empirical formula of the compound?

Accepted Answer

$$CH_2O$$

Question 9

Which of the following is the correct name for $$NaNO_2$$?

Accepted Answer

Sodium nitrite

Question 10

Which of the following statements about polyatomic ions is correct?

Accepted Answer

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

Question 11

What is the correct name for $$CuSO_4$$ \cdot 5H_2O$$?

Accepted Answer

Copper(II) sulfate pentahydrate

Question 12

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

Accepted Answer

$$N_2O_4$$

Question 13

Which of the following is the correct name for $$H_2SO_4$$?

Accepted Answer

Sulfuric acid

Question 14

A hydrocarbon with the formula $$C_3H_8 is $$used as a fuel for outdoor grills. What is its name?

Accepted Answer

Propane

Question 15

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

Accepted Answer

$$Ca_3$$($$PO_4)_2$

Question 16

Which of the following is the correct name for $$N_2O_5$$?

Accepted Answer

Dinitrogen pentoxide

Question 17

Which of the following is the correct formula for the compound formed between aluminum and oxygen?

Accepted Answer

$$Al_2O_3$$

Question 18

Which of the following is the correct name for $$K_2SO_4$$?

Accepted Answer

Potassium sulfate

Question 19

A compound is found to contain 27.3% carbon and 72.7% oxygen by mass. What is the empirical formula?

Accepted Answer

$$CO_2$$

Question 20

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

Accepted Answer

$$(NH_4$)_2SO_4$$

Chapter 3: Molecules and Compounds – Structure, Bonding, and Nomenclature

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