Question 1

Which of the following best describes an intensive property?

Accepted Answer

A property that does not depend on the amount of substance present, such as density.

Question 2

A student measures the mass of a block as 45.3 kg. If the density of iron is $$7.847\ \mathrm{g/mL}$$, what is the volume of the block in liters?

Accepted Answer

$$5.77\ \mathrm{L}$$

Question 3

Which of the following is a chemical change?

Accepted Answer

Iron rusting in moist air

Question 4

Which of the following is a heterogeneous mixture?

Accepted Answer

Chocolate chip cookie

Question 5

Convert $$752\ \mathrm{mi/hr} to$$ $$\mathrm{m/s}$$. ($$1\ \mathrm{mi} = 1609\ \mathrm{m})$$

Accepted Answer

$$336\ \mathrm{m/s}$$

Question 6

Which of the following is NOT a base SI unit?

Accepted Answer

Liter

Question 7

A sample of a substance has a mass of $$1.05\ \mathrm{lb}$$ and a volume of $$425\ \mathrm{mL}. $$What is its density in $$\mathrm{g/mL}$$? ($$1\ \mathrm{lb} = 453.6\ \mathrm{g})$$

Accepted Answer

$$1.12\ \mathrm{g/mL}$$

Question 8

Which of the following is an example of a derived unit?

Accepted Answer

Newton

Question 9

Which of the following is a physical property?

Accepted Answer

Melting point

Question 10

How many significant figures are in the measurement $$0.004560$$?

Accepted Answer

4

Question 11

Which of the following best describes a compound?

Accepted Answer

A substance composed of two or more elements chemically combined in fixed proportions

Question 12

A wine barrel holds $$31\ \mathrm{gal}. $$How many $$750\ \mathrm{mL}$$ bottles can be filled from the barrel? ($$1\ \mathrm{gal} = 3.79\ \mathrm{L})$$

Accepted Answer

156

Question 13

Which of the following is an extensive property?

Accepted Answer

Volume

Question 14

Which temperature scale cannot have negative values?

Accepted Answer

Kelvin

Question 15

A student rounds $$0.0045678 to $$three significant figures. What is the correct answer?

Accepted Answer

$$0.00457$$

Question 16

Which of the following is a homogeneous mixture?

Accepted Answer

Tea with sugar

Question 17

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

Accepted Answer

Melting of ice

Question 18

Which of the following is an exact number?

Accepted Answer

The number of students in a classroom

Question 19

Which of the following is a correct statement about significant figures in calculations?

Accepted Answer

When multiplying or dividing, the answer should have as many significant figures as the number with the fewest significant figures.

Question 20

A gold leaf is used to cover a ceiling of $$100\ \mathrm{ft} 	imes 82\ \mathrm{ft}$$ with a thickness of $$5 	imes 10$$^{-6}$$ inches. The density of gold is 19.32$$\ \mathrm{$$g/cm^3$$}$$ and the cost is 1552$ per troy ounce (1$$\ \mathrm{troy\ ounce} = 31.1034768\ \mathrm{g}$$). What is the cost of the gold needed? (1$$\ \mathrm{in} = 2.54\ \mathrm{cm}$$, 1$$\ \mathrm{ft} = 12\ \mathrm{in}$$)

Accepted Answer

$$1,300,000$$

Chapter 1: The Basics of Chemistry – Matter, Measurement, and Classification

Guida di studio - Domande di pratica

Study guide - Flashcard