Q: A student measures the mass of a sample as 12.30 g and its volume as 4.10 mL. What is the density of the sample, and how many significant figures should the answer have?

$$3.00\ \text{g/mL}$$, 3 significant figures

Q: A student wants to convert $$500\ \text{mg} to $$grams. Which conversion factor should be used?

$$1\ \text{g} = 1000\ \text{mg}$$

Q: A sample of water has a mass of $$250\ \text{g}$$ and a volume of $$250\ \text{mL}. $$What is its density, and what does this tell you about the purity of the water?

$$1.0\ \text{g/mL}$$; the water is likely pure

Q: Which of the following is the correct conversion factor to change liters to milliliters?

$$1\ \text{L} = 1000\ \text{mL}$$

Question 1

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

Accepted Answer

Burning wood in a campfire

Question 2

Which property is classified as an extensive property?

Accepted Answer

Volume

Question 3

A student measures the mass of a sample as 12.30 g and its volume as 4.10 mL. What is the density of the sample, and how many significant figures should the answer have?

Accepted Answer

$$3.00\ 	ext{g/mL}$$, 3 significant figures

Question 4

Which of the following phase changes is irreversible under normal laboratory conditions?

Accepted Answer

Burning gasoline

Question 5

Which SI base unit is used to measure electric current?

Accepted Answer

Ampere

Question 6

A sample of ethanol has a mass of 46.0 g and a volume of 58.0 mL. What is its density?

Accepted Answer

$$0.793\ 	ext{g/mL}$$

Question 7

Which of the following is a physical property?

Accepted Answer

Boiling point

Question 8

Convert $$2.5\ 	ext{km} to $$meters using the correct conversion factor.

Accepted Answer

$$2500\ 	ext{m}$$

Question 9

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

Accepted Answer

Micro-

Question 10

A thermometer reads $$25.0\ ^\circ	ext{C}. $$What is this temperature in Kelvin?

Accepted Answer

$$298.2\ 	ext{K}$$

Question 11

Which of the following statements about significant figures is correct?

Accepted Answer

Zeros between nonzero digits are always significant.

Question 12

Which of the following is an example of an intensive property?

Accepted Answer

Density

Question 13

A student wants to convert $$500\ 	ext{mg} to $$grams. Which conversion factor should be used?

Accepted Answer

$$1\ 	ext{g} = 1000\ 	ext{mg}$$

Question 14

Which of the following is NOT a base SI unit?

Accepted Answer

Gram

Question 15

Which process is a reversible phase change?

Accepted Answer

Melting ice

Question 16

A student records the following measurements: $$0.00450\ 	ext{g}$$, $$0.0450\ 	ext{g}$$, and $$0.450\ 	ext{g}. $$How many significant figures are in each measurement, respectively?

Accepted Answer

3, 3, 3

Question 17

Which of the following is the correct scientific notation for $$0.00056$$?

Accepted Answer

$$5.6 	imes 10$$^{-4}$$

Question 18

Which of the following is a chemical property?

Accepted Answer

Ability to react with oxygen

Question 19

A sample of water has a mass of $$250\ 	ext{g}$$ and a volume of $$250\ 	ext{mL}. $$What is its density, and what does this tell you about the purity of the water?

Accepted Answer

$$1.0\ 	ext{g/mL}$$; the water is likely pure

Question 20

Which of the following is the correct conversion factor to change liters to milliliters?

Accepted Answer

$$1\ 	ext{L} = 1000\ 	ext{mL}$$

Introduction to General Chemistry: Matter, Measurement, and Properties

Study Guide - Practice Questions

Study Guide - Flashcards