Question 1

Which of the following best describes a compound?

Accepted Answer

A substance composed of atoms of two or more different elements chemically united in fixed proportions.

Question 2

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

Accepted Answer

Density

Question 3

A sample of gold has a mass of 19.32 g and a volume of 1.00 cm$$^3. $$What is the density of gold in g/cm$$^3$$?

Accepted Answer

$$19.32\ \mathrm{g/cm^3$}$$

Question 4

Which separation technique would be most appropriate to separate a mixture of sand and salt water?

Accepted Answer

Filtration

Question 5

Convert 25.0 °C to Kelvin.

Accepted Answer

$$298.2\ \mathrm{K}$$

Question 6

Which of the following is a chemical property?

Accepted Answer

Flammability

Question 7

A student measures the mass of a sample three times and gets values of 2.51 g, 2.50 g, and 2.52 g. The true mass is 2.00 g. Which statement is correct?

Accepted Answer

The measurements are precise but not accurate.

Question 8

Which of the following is a heterogeneous mixture?

Accepted Answer

Granite

Question 9

How many significant figures are in the measurement 0.01080 g?

Accepted Answer

5

Question 10

Which of the following is the correct SI base unit for temperature?

Accepted Answer

Kelvin

Question 11

A solution is prepared by dissolving table salt in water. Which term best describes this solution?

Accepted Answer

Homogeneous mixture

Question 12

Which of the following is NOT a physical change?

Accepted Answer

Burning of gasoline

Question 13

A sample of ethanol has a density of 0.79 g/cm$$^3. $$What is the mass of 50.0 mL of ethanol?

Accepted Answer

$$39.5\ \mathrm{g}$$

Question 14

Which of the following is the correct formula for converting Celsius to Fahrenheit?

Accepted Answer

$$^\circ\mathrm{F} = \frac{9}{5}(^\circ\mathrm{C}) + 32$$

Question 15

Which of the following statements about the Law of Constant Composition is correct?

Accepted Answer

The relative number of atoms of each element in a compound is always the same.

Question 16

A runner completes a 100.00 m dash in 10.5 s. What is her average speed in m/s, expressed to the correct number of significant figures?

Accepted Answer

$$9.52\ \mathrm{m/s}$$

Question 17

Which of the following is the correct expression for kinetic energy?

Accepted Answer

$$KE = \frac{1}{2} m v^2$

Question 18

Which of the following is an example of a physical property that can be used to separate a mixture by distillation?

Accepted Answer

Boiling point

Question 19

Which of the following is the correct derived SI unit for energy?

Accepted Answer

Joule

Question 20

A block of wood has a mass of 160 g and a volume of 200 cm$$^3. $$What is its density in g/cm$$^3$$?

Accepted Answer

$$0.80\ \mathrm{g/cm^3$}$$

Chapter 1: Introduction to Matter, Energy, and Measurement

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