Question 1

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

Accepted Answer

Burning wood in a campfire

Question 2

A student mixes sand and salt together in a beaker. What type of matter is formed?

Accepted Answer

Heterogeneous mixture

Question 3

Which property is intensive?

Accepted Answer

Density

Question 4

A cube has a side length of 4.00 cm and a mass of 256 g. What is its density?

Accepted Answer

$$\frac{256}{64.0} g/cm$^3$$

Question 5

Which of the following is a pure substance?

Accepted Answer

Gold

Question 6

Convert 0.0056 kg to milligrams (mg).

Accepted Answer

$$0.0056 	imes 10^6$ mg

Question 7

Which statement best describes a physical property?

Accepted Answer

It can be measured without changing the substance's chemical identity.

Question 8

A sample of water is heated from 25°C to 100°C. What type of change occurs?

Accepted Answer

Physical change

Question 9

Which of the following is the correct formula to convert Celsius to Kelvin?

Accepted Answer

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

Question 10

A student measures the mass of a metal object as 45.0 g and its volume as 15.0 mL. What is the density of the object?

Accepted Answer

$$3.00 g/mL$$

Question 11

Which of the following is NOT an SI base unit?

Accepted Answer

Gram (g)

Question 12

A solution is prepared by dissolving salt in water. What type of mixture is formed?

Accepted Answer

Homogeneous mixture

Question 13

Which metric prefix represents $$10^{-6}$$?

Accepted Answer

Micro

Question 14

A student records the following measurements: 0.00450 m, 0.0450 m, and 0.450 m. How many significant figures are in each measurement?

Accepted Answer

3, 3, 3

Question 15

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

Accepted Answer

A compound is chemically bonded, while a mixture is physically combined.

Question 16

A graduated cylinder contains 200 mL of water. After a metal object is submerged, the water level rises to 265 mL. What is the volume of the object?

Accepted Answer

$$65 mL$$

Question 17

Which of the following is an extensive property?

Accepted Answer

Mass

Question 18

A student needs to convert 654 kg to grams. What is the correct calculation?

Accepted Answer

$$654 	imes 10^3$ g

Question 19

Which of the following is the correct scientific notation for 0.00000668?

Accepted Answer

$$6.68 	imes 10$$^{-6}$$

Question 20

A student multiplies 2.50 m by 3.0 m. How many significant figures should the answer have?

Accepted Answer

2

Introduction to General Chemistry: Matter, Properties, and Measurement

Study Guide - Practice Questions