Question 1

Which of the following statements best describes the difference between ionic and covalent bonding?

Accepted Answer

Ionic bonding involves the complete transfer of valence electrons from a metal to a nonmetal, resulting in the formation of cations and anions, while covalent bonding involves the sharing of electrons between two nonmetals.

Question 2

How many valence electrons does an atom of sulfur (S) have?

Accepted Answer

Sulfur is in group 6A, so it has $$6$$ valence electrons.

Question 3

Which of the following is the correct Lewis dot symbol for carbon (C)?

Accepted Answer

C with 4 dots around it

Question 4

What is the correct formula for the ionic compound formed between magnesium and chlorine?

Accepted Answer

$$\mathrm{$$MgCl_2$$}$$

Question 5

Which of the following is the correct name for the compound $$\mathrm{Na_2SO_4}$$?

Accepted Answer

Sodium sulfate

Question 6

A sample contains $$4.33 	imes 10$$^{23}$$ atoms of lithium. How many moles of lithium are present?

Accepted Answer

$$0.720$$ mol

Question 7

What is the percent composition of oxygen in lactic acid ($$\mathrm{C_3H_6O_3}$$)? (Atomic masses: C = 12.01, H = 1.008, O = 16.00)

Accepted Answer

$$53.28\%$$

Question 8

Which of the following is the correct empirical formula for a compound with a mass composition of $$26.7\% C$$, $$4.5\% H$$, and $$68.8\% O$$?

Accepted Answer

$$\mathrm{CH_2O}$$

Question 9

What is the correct name for the compound $$\mathrm{Fe(NO_3$)_3}$$?

Accepted Answer

Iron(III) nitrate

Question 10

Which of the following is a polyatomic ion?

Accepted Answer

$$\mathrm{CO_3$^{2-}}$$

Question 11

What is the molecular mass of $$\mathrm{C_2H_5OH} ($$ethanol)? (Atomic masses: C = 12.01, H = 1.008, O = 16.00)

Accepted Answer

$$46.07$$ amu

Question 12

Which of the following compounds is a Type 3 (molecular) compound?

Accepted Answer

$$\mathrm{CO_2$}$$

Question 13

What is the correct formula for ammonium sulfate?

Accepted Answer

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

Question 14

A compound has an empirical formula of $$\mathrm{CH_2O}$$ and a molar mass of $$180 g/$$mol. What is its molecular formula?

Accepted Answer

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

Question 15

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

Accepted Answer

Dinitrogen tetroxide

Question 16

How many grams of nitrogen are present in $$25.0 g of$$ $$\mathrm{Fe(NO_3$)_3}$$? (Molar mass of $$\mathrm{Fe(NO_3$)_3}$$ = $$241.86 g/$$mol)

Accepted Answer

$$3.89 g$$

Question 17

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

Accepted Answer

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

Question 18

Which of the following is the correct name for $$\mathrm{H_2SO_4}$$ when dissolved in water?

Accepted Answer

Sulfuric acid

Question 19

What is the molar mass of ammonium sulfate ($$\mathrm{(NH_4$)_2SO_4}$$)? (Atomic masses: N = 14.01, H = 1.008, S = 32.07, O = 16.00)

Accepted Answer

$$132.14 g/$$mol

Chapter 5: Ionic and Covalent Compounds – Structured Study Notes

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