$$\text{Density} = \frac{\text{mass}}{\text{volume}}$$

Question 1

Which of the following best describes a homogeneous mixture?

Accepted Answer

A mixture in which the composition is uniform throughout.

Question 2

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

Accepted Answer

Dissolving sugar in water

Question 3

A student mixes sand and salt in a beaker. Which classification best describes the resulting mixture?

Accepted Answer

Heterogeneous mixture

Question 4

Which of the following is NOT a chemical property?

Accepted Answer

Melting point

Question 5

Which of the following is an intensive property?

Accepted Answer

Density

Question 6

Which SI base unit is used to measure electric current?

Accepted Answer

Ampere (A)

Question 7

Convert 654 kg to g using metric prefixes.

Accepted Answer

$$6.54 	imes 10^5$ g

Question 8

Which of the following scientific notation values is written correctly?

Accepted Answer

$$1.25 	imes 10^5$

Question 9

How many significant figures are in the measurement 0.003640?

Accepted Answer

4

Question 10

A cube of silver has a density of 10.5 g/cm$$^3$$ and measures 0.36 m on each side. What is its mass in kilograms?

Accepted Answer

$$4.87 kg$$

Question 11

Which of the following is an example of an irreversible change?

Accepted Answer

Burning wood in a campfire

Question 12

Which of the following is classified as an extensive property?

Accepted Answer

Mass

Question 13

A scientist measures the length of a pencil as 8.70 cm. How many significant figures are in this measurement?

Accepted Answer

3

Question 14

Which of the following is NOT a physical property?

Accepted Answer

Potassium metal is extremely reactive when placed in water.

Question 15

If the density of an unknown metal is 2.14 g/cm$$^3$$, express its density in kg/m$$^3.$$

Accepted Answer

$$2.14 	imes 10^3$ kg/m^3$

Question 16

Which of the following processes is a chemical change?

Accepted Answer

Cooking an egg

Question 17

A room has a volume of $$1.5 	imes 10^3$ m^3$. What is the volume in km^3$?

Accepted Answer

$$1.5 	imes 10$$^{-6}$$ km^3$

Question 18

Which of the following is the correct formula for density?

Accepted Answer

$$	ext{Density} = \frac{	ext{mass}}{	ext{volume}}$$

Question 19

Which of the following temperature conversions is correct?

Accepted Answer

$$K = ^\circ C + 273.15$$

Question 20

A pharmaceutical drug contains 4.0% active ingredient by mass. What mass of active ingredient is present in one bottle of 120 g?

Accepted Answer

$$4.8 g$$

Chapter 1: Introduction – Matter & Measurement (General Chemistry Study Notes)

Study Guide - Practice Questions