Question 1

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

Accepted Answer

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

Question 2

What is the correct formula for the ionic 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?

Accepted Answer

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

Question 4

A neutral oxygen atom ($$Z = 8) $$gains two electrons. What is the resulting ion and its charge?

Accepted Answer

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

Question 5

Which of the following is a polyatomic ion?

Accepted Answer

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

Question 6

What is the correct name for the compound $$\mathrm{$$FeCl_3$$}$$?

Accepted Answer

Iron(III) chloride

Question 7

Which of the following compounds is named using the prefix system for covalent compounds?

Accepted Answer

$$\mathrm{CO_2$}$$: Carbon dioxide

Question 8

What is the empirical formula for a compound containing 0.42 mol Zn, 0.28 mol P, and 1.12 mol O?

Accepted Answer

$$\mathrm{ZnP_2O_4}$$

Question 9

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

Accepted Answer

$$\mathrm{KC_2H_3O_2}$$

Question 10

A compound is found to contain 75% C and 25% H by mass. What is its empirical formula?

Accepted Answer

$$\mathrm{CH}$$

Question 11

What is the molar mass of $$\mathrm{CO_2$}$$?

Accepted Answer

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

Question 12

Which of the following is the correct name for $$\mathrm{H_2SO_4}$$?

Accepted Answer

Sulfuric acid

Question 13

What is the correct formula for copper(II) sulfate pentahydrate?

Accepted Answer

$$\mathrm{$$CuSO_4$$ \cdot 5H_2O}$$

Question 14

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

Accepted Answer

Dinitrogen tetroxide

Question 15

A sample contains 27.9 g of ammonium carbonate ($$\mathrm{(NH_4$)_2CO_3}). $$How many formula units are present? (Molar mass = $$96.09\ \mathrm{g/mol})$$

Accepted Answer

$$1.75 	imes 10$$^{22}$$

Question 16

Which of the following is the correct name for $$\mathrm{$$NaHCO_3$$}$$?

Accepted Answer

Sodium bicarbonate

Question 17

Which of the following is the correct formula for aluminum carbonate?

Accepted Answer

$$\mathrm{Al_2$(CO_3$)_3}$$

Question 18

A compound has an empirical formula of $$\mathrm{C_2H_4O}$$ and a molar mass of $$88.11\ \mathrm{g/mol}. $$What is its molecular formula?

Accepted Answer

$$\mathrm{C_4H_8O_2}$$

Question 19

Which of the following is the correct name for $$\mathrm{$$HNO_2$$}$$?

Accepted Answer

Nitrous acid

Question 20

Which of the following statements about ionic compounds is TRUE?

Accepted Answer

Ionic compounds are generally solids with high melting and boiling points.

Compounds, Nomenclature, and Molecular Mass – Chapter 3 Study Notes

Study Guide - Practice Questions

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