Question 1

Which of the following best describes an intensive property of matter?

Accepted Answer

Density of a substance

Question 2

A student measures the mass of a sample as 12.30 g and its volume as 4.1 mL. What is the density of the sample, and how many significant figures should the answer have?

Accepted Answer

$$3.0\ g/mL$$ with 2 significant figures

Question 3

Which of the following is a chemical property?

Accepted Answer

Reactivity with oxygen

Question 4

Which of the following substances is a homogeneous mixture?

Accepted Answer

Air

Question 5

A scientist adds 0.250 L of water to a beaker containing 150 mL of ethanol. What is the total volume in milliliters?

Accepted Answer

$$400\ mL$$

Question 6

Which SI base unit is used to measure the amount of substance?

Accepted Answer

Mole

Question 7

Convert $$2.5\ km to $$miles using the conversion $$1\ km = 0.6214\ miles.$$

Accepted Answer

$$1.55\ miles$$

Question 8

Which of the following statements about significant figures is correct?

Accepted Answer

Trailing zeros are only significant if there is a decimal point

Question 9

A measurement is recorded as $$0.004560\ g. $$How many significant figures does this value have?

Accepted Answer

4

Question 10

Which temperature scale is used in scientific measurements and is based on absolute zero?

Accepted Answer

Kelvin

Question 11

A student adds $$12.45\ g$$ and $$0.034\ g$$ together. What is the correct answer with proper significant figures?

Accepted Answer

$$12.48\ g$$

Question 12

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

Accepted Answer

Melting ice

Question 13

A sample contains $$3.00\ times 10^3$\ mg of a $$substance. How many grams is this?

Accepted Answer

$$3.00\ g$$

Question 14

Which of the following is NOT a base unit in the SI system?

Accepted Answer

Gram

Question 15

A football player threw 36 touchdowns in 16 games. How many touchdowns per game did he throw, and how many significant figures should the answer have?

Accepted Answer

$$2.25$$ touchdowns/game with 3 significant figures

Question 16

Which of the following is a heterogeneous mixture?

Accepted Answer

Salad

Question 17

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

Accepted Answer

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

Question 18

A student multiplies $$14.0 by$$ $$4.520. $$How many significant figures should the answer have?

Accepted Answer

Three

Question 19

Which of the following is a compound?

Accepted Answer

Water ($$H_2O)$$

Question 20

A cube has a volume of $$2.0\ times 10^3$\ cm^3$. How many liters is this? (1$$\ L = 1000\ $$cm^3)$$

Accepted Answer

$$2.0\ L$$

General Chemistry Chapter 1: Matter, Measurement, and Scientific Foundations

Guida di studio - Domande di pratica

Study guide - Flashcard