Question 1

Which of the following best describes the scientific approach in chemistry?

Accepted Answer

Making observations, forming a hypothesis, conducting experiments, and revising the hypothesis based on results.

Question 2

A sample of seawater is best classified as which type of matter?

Accepted Answer

Heterogeneous mixture

Question 3

Which of the following is a chemical change?

Accepted Answer

Burning wood

Question 4

Which SI unit and abbreviation is used for measuring mass?

Accepted Answer

Kilogram (kg)

Question 5

Convert a temperature of $$25\ ^\circ \mathrm{C} to $$Kelvin.

Accepted Answer

$$298\ \mathrm{K}$$

Question 6

How many significant figures are in the measurement 0.00450 g?

Accepted Answer

3

Question 7

Which of the following calculations has the correct number of significant figures? $$2.34 	imes 1.2$$

Accepted Answer

$$2.8$$

Question 8

A patient’s body temperature is measured as $$102.2\ ^\circ \mathrm{F}. $$What is this temperature in Celsius?

Accepted Answer

$$39.0\ ^\circ \mathrm{C}$$

Question 9

Which of the following is a physical property?

Accepted Answer

Color

Question 10

Which conversion factor would you use to convert 5.0 L of water to mass, given the density of water is $$1.00\ \mathrm{g/mL}$$?

Accepted Answer

$$1000\ \mathrm{g/L}$$

Question 11

A student measures the length of a desk as 1.234 m. How many significant figures are in this measurement?

Accepted Answer

4

Question 12

Which of the following is NOT a base SI unit?

Accepted Answer

Gram

Question 13

A chemical spill contains a mixture of sand, salt, and water. What type of matter is this?

Accepted Answer

Heterogeneous mixture

Question 14

Which equation correctly converts Celsius to Fahrenheit?

Accepted Answer

$$F = \frac{9}{5}C + 32$$

Question 15

A sample has a mass of 250 g and a volume of 200 mL. What is its density?

Accepted Answer

$$1.25\ \mathrm{g/mL}$$

Question 16

Which of the following changes is a chemical change?

Accepted Answer

Formation of rust on iron

Question 17

A nurse needs to convert 500 mL of saline solution to liters. What is the correct volume in liters?

Accepted Answer

$$0.5\ \mathrm{L}$$

Question 18

Which of the following is the correct abbreviation for the SI unit of time?

Accepted Answer

s

Question 19

A student records a measurement as 0.0200 kg. How many significant figures does this value have?

Accepted Answer

4

Question 20

A chemist needs to convert 2.5 hours to seconds. What is the correct answer?

Accepted Answer

$$9000\ \mathrm{s}$$

Chapter 1: Matter, Measurement & Problem Solving – Study Notes

Study Guide - Practice Questions