Question 1

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

Accepted Answer

An empirical formula shows the simplest whole-number ratio of atoms of each element, while a molecular formula shows the exact number of atoms of each element in a compound.

Question 2

What is the empirical formula for glucose, whose molecular formula is $$C_6H_{12}O_6$?

Accepted Answer

$$CH_2O$$

Question 3

Which of the following compounds is an example of an ionic compound?

Accepted Answer

$$NaCl$$

Question 4

A compound contains 2 aluminum ions ($$Al^{3+}) $$and 3 oxide ions ($$O^{2-}). $$What is its chemical formula?

Accepted Answer

$$Al_2O_3$$

Question 5

Which of the following is the correct name for $$FeCl_3$$?

Accepted Answer

Ferric chloride

Question 6

What is the correct formula for magnesium hydroxide?

Accepted Answer

$$Mg(OH)_2$$

Question 7

Which of the following is the correct name for $$N_2O$$?

Accepted Answer

Dinitrogen monoxide

Question 8

A hydrate is a compound that contains a specific number of water molecules. What is the correct formula for magnesium sulfate heptahydrate?

Accepted Answer

$$MgSO_4$$ \cdot 7H_2O$$

Question 9

Which of the following is the correct name for $$H_2SO_4$$ when dissolved in water?

Accepted Answer

Sulfuric acid

Question 10

What is the correct formula for potassium dichromate?

Accepted Answer

$$K_2Cr_2O_7$$

Question 11

Which of the following is the correct name for $$CaCO_3$$?

Accepted Answer

Calcium carbonate

Question 12

A compound is named dinitrogen tetrachloride. What is its chemical formula?

Accepted Answer

$$N_2Cl_4$$

Question 13

Which of the following is the correct formula for iron(II) nitrite?

Accepted Answer

$$Fe(NO_2$)_2$$

Question 14

What is the correct name for $$NH_4H_2PO_4$$?

Accepted Answer

Ammonium hydrogen phosphate

Question 15

Which of the following is the correct formula for cobalt(II) chloride hexahydrate?

Accepted Answer

$$CoCl_2$$ \cdot 6H_2O$$

Question 16

Which of the following is the correct name for $$HNO_3$$?

Accepted Answer

Nitric acid

Question 17

Which of the following is the correct formula for mercury(I) chloride?

Accepted Answer

$$Hg_2Cl_2$$

Question 18

Which of the following is the correct name for $$NaHCO_3$$?

Accepted Answer

Sodium hydrogen carbonate

Question 19

Which of the following is the correct formula for strontium nitrate tetrahydrate?

Accepted Answer

$$Sr(NO_3$)_2 \cdot 4H_2O$$

Question 20

Which of the following is the correct name for $$KNO_3$$?

Accepted Answer

Potassium nitrate

Atoms, Molecules, and Ions: Chemical Formulas and Nomenclature

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