Question 1

Which of the following best describes the difference between an ionic and a covalent compound?

Accepted Answer

Ionic compounds are formed by transferring electrons from a metal to a nonmetal, while covalent compounds are formed by sharing electrons between two nonmetals.

Question 2

What is the correct formula for a compound formed between magnesium (Mg) and nitrogen (N)?

Accepted Answer

$$\mathrm{Mg_3N_2}$$

Question 3

Which of the following ions is isoelectronic with argon ($$\mathrm{Ar}$$)?

Accepted Answer

$$\mathrm{Ca$$^{2+}$$}$$

Question 4

A sample of an unknown compound contains 0.42 mol of zinc, 0.28 mol of phosphorus, and 1.12 mol of oxygen. What is its empirical formula?

Accepted Answer

Question 5

Which of the following is the correct name for $$\mathrm{$$FeCl_3$$}$$?

Accepted Answer

Iron(III) chloride

Question 6

What is the molar mass of carbon dioxide ($$\mathrm{CO_2$}$$)? (Atomic masses: C = 12.01 g/mol, O = 16.00 g/mol)

Accepted Answer

$$44.01\ \mathrm{g/mol}$$

Question 7

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

Accepted Answer

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

Question 8

A compound is found to contain 40.0% carbon, 6.7% hydrogen, and 53.3% oxygen by mass. What is its empirical formula?

Accepted Answer

$$\mathrm{CH_2O}$$

Question 9

Which of the following is the correct name for $$\mathrm{N_2O_5}$$?

Accepted Answer

Dinitrogen pentoxide

Question 10

What is the correct name for $$\mathrm{H_2SO_4}$$?

Accepted Answer

Sulfuric acid

Question 11

Which of the following statements about ionic compounds is TRUE?

Accepted Answer

Ionic compounds have high melting and boiling points.

Question 12

How many oxygen atoms are present in 2.00 moles of water ($$\mathrm{H_2O}$$)? (Avogadro's number $$= 6.022 	imes 10$$^{23}$$)

Accepted Answer

$$1.20 	imes 10$$^{24}$$

Question 13

Which of the following is the correct name for $$\mathrm{$$KNO_3$$}$$?

Accepted Answer

Potassium nitrate

Question 14

A 10.0 g sample of a compound contains 1.75 g hydrogen and 8.25 g oxygen. What is the empirical formula?

Accepted Answer

$$\mathrm{H_2O}$$

Question 15

Which of the following is the correct name for $$\mathrm{$$CuSO_4$$ \cdot 5H_2O}$$?

Accepted Answer

Copper(II) sulfate pentahydrate

Question 16

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

Accepted Answer

$$\mathrm{N_2O_4}$$

Question 17

Which of the following is the correct name for $$\mathrm{$$HClO_3$$}$$?

Accepted Answer

Chloric acid

Question 18

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

Accepted Answer

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

Question 19

Which of the following is the correct name for $$\mathrm{$$NaHCO_3$$}$$, a common ingredient in baking soda?

Accepted Answer

Sodium bicarbonate

Question 20

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

Accepted Answer

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

Compounds, Nomenclature, and Molecular Mass – General Chemistry 1A Chapter 3 Study Notes

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