Q: A student measures the mass of a liquid as 45.0 g and its volume as 15.0 mL. What is the density of the liquid, expressed with the correct number of significant figures?

$$d = \frac{45.0\ \text{g}}{15.0\ \text{mL}} = 3.0\ \text{g/mL}$$

Q: A sample of copper has a mass of 63.5 g and occupies a volume of 7.10 cm$$^3. $$What is its density?

$$d = \frac{63.5\ \text{g}}{7.10\ \text{cm}^3} = 8.94\ \text{g/cm}^3$$

Q: Which of the following is a real-world example of a covalent bond?

The bond between hydrogen and oxygen in water ($$\text{H}_2\text{O})$$

Q: Which of the following is a multi-step problem involving density and significant figures: A block of metal has a mass of 125.0 g and a volume of 16.0 cm$$^3. $$Calculate its density and report your answer with the correct number of significant figures.

$$d = \frac{125.0\ \text{g}}{16.0\ \text{cm}^3} = 7.8\ \text{g/cm}^3$$

Question 1

Which of the following statements best describes a compound?

Accepted Answer

A substance composed of two or more elements chemically combined in a fixed ratio.

Question 2

Which SI unit would you use to measure the amount of a substance in a chemical reaction?

Accepted Answer

Mole

Question 3

A student measures the mass of a liquid as 45.0 g and its volume as 15.0 mL. What is the density of the liquid, expressed with the correct number of significant figures?

Accepted Answer

$$d = \frac{45.0\ 	ext{g}}{15.0\ 	ext{mL}} = 3.0\ 	ext{g/mL}$$

Question 4

Which of the following best explains why ionic bonds form between metals and nonmetals?

Accepted Answer

Metals lose electrons to nonmetals, resulting in the formation of oppositely charged ions that attract each other.

Question 5

Which of the following is NOT a pure substance?

Accepted Answer

Air

Question 6

A chemist needs to measure the temperature of a reaction. Which SI unit should be used?

Accepted Answer

Kelvin

Question 7

Which of the following statements about atoms is correct?

Accepted Answer

Protons and neutrons are located in the nucleus, while electrons orbit around it.

Question 8

Which of the following is an example of a chemical change?

Accepted Answer

Burning wood

Question 9

A sample of copper has a mass of 63.5 g and occupies a volume of 7.10 cm$$^3. $$What is its density?

Accepted Answer

$$d = \frac{63.5\ 	ext{g}}{7.10\ 	ext{cm}^3} = 8.94\ 	ext{g/cm}^3$$

Question 10

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

Accepted Answer

An element cannot be broken down by chemical means, while a compound can.

Question 11

Which of the following is the correct formula for density?

Accepted Answer

$$d = \frac{m}{V}$$

Question 12

A student records the following measurements: 0.00560 m, 5.60 m, and 560 m. Which measurement has the greatest number of significant figures?

Accepted Answer

0.00560 m

Question 13

Which of the following is a real-world example of a covalent bond?

Accepted Answer

The bond between hydrogen and oxygen in water ($$	ext{H}_2	ext{O})$$

Question 14

Which property distinguishes a gas from a solid and a liquid?

Accepted Answer

A gas has neither a fixed shape nor a fixed volume.

Question 15

Which of the following best describes the periodic table's organization?

Accepted Answer

Elements are arranged by increasing atomic number.

Question 16

A medical laboratory needs to measure the mass of a sample. Which SI unit should be used?

Accepted Answer

Kilogram

Question 17

Which of the following is a multi-step problem involving density and significant figures: A block of metal has a mass of 125.0 g and a volume of 16.0 cm$$^3. $$Calculate its density and report your answer with the correct number of significant figures.

Accepted Answer

$$d = \frac{125.0\ 	ext{g}}{16.0\ 	ext{cm}^3} = 7.8\ 	ext{g/cm}^3$$

Question 18

Which of the following is NOT an SI base unit?

Accepted Answer

Gram

Question 19

Which of the following best describes significant figures?

Accepted Answer

They express the precision of a measurement.

Question 20

Which of the following is a real-world example of an ionic bond?

Accepted Answer

The bond between sodium and chlorine in table salt ($$	ext{NaCl})$$

Matter and Measurements: General Chemistry Study Guide

Study Guide - Practice Questions

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