Question 1

A sample of metal has a mass of 45.0 g and a volume of 15.0 mL. What is the density of the metal?

Accepted Answer

$$3.00\ \mathrm{g/mL}$$

Question 2

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

Accepted Answer

Iron rusts when exposed to oxygen.

Question 3

A graduated cylinder contains 25.0 mL of water. After a metal object is submerged, the water level rises to 32.5 mL. If the mass of the object is 60.0 g, what is its density?

Accepted Answer

$$2.67\ \mathrm{g/mL}$$

Question 4

Which of the following is a heterogeneous mixture?

Accepted Answer

Salad dressing with oil and vinegar

Question 5

Convert $$0.0004560 to $$scientific notation with the correct number of significant figures.

Accepted Answer

$$4.560 	imes 10$$^{-4}$$

Question 6

Which of the following statements about energy is correct?

Accepted Answer

Kinetic energy is the energy of motion, while potential energy is stored energy.

Question 7

A patient receives 250 mL of a saline solution with a density of $$1.05\ \mathrm{g/mL}. $$What is the mass of the solution delivered?

Accepted Answer

$$262.5\ \mathrm{g}$$

Question 8

Which of the following changes is a physical change?

Accepted Answer

Ice melting to form liquid water

Question 9

A sample of ethanol absorbs $$500.0\ \mathrm{cal} of $$heat, raising its temperature from $$20.0^\circ\mathrm{C} to$$ $$40.0^\circ\mathrm{C}. If $$the mass of ethanol is $$50.0\ \mathrm{g}$$, what is the specific heat of ethanol?

Accepted Answer

$$0.50\ \mathrm{cal/(g\ ^\circ C)}$$

Question 10

Which of the following is a pure substance?

Accepted Answer

Distilled water

Question 11

A nurse needs to prepare a solution with a specific gravity of $$1.20. If $$the density of water is $$1.00\ \mathrm{g/mL}$$, what is the density of the solution?

Accepted Answer

$$1.20\ \mathrm{g/mL}$$

Question 12

Which of the following best describes the process of sublimation?

Accepted Answer

A solid changing directly to a gas

Question 13

A student adds $$2.50\ \mathrm{g} of $$salt to $$97.5\ \mathrm{g} of $$water and stirs until dissolved. What type of mixture is formed?

Accepted Answer

Homogeneous mixture

Question 14

Which of the following is the correct temperature conversion from $$25.0^\circ\mathrm{C} to $$Kelvin?

Accepted Answer

$$298.2\ \mathrm{K}$$

Question 15

A block of ice at $$0^\circ\mathrm{C} is $$heated until it becomes steam at $$100^\circ\mathrm{C}. $$Which of the following phase changes occur during this process?

Accepted Answer

Melting and boiling

Question 16

Which of the following best describes a physical property?

Accepted Answer

The melting point of sodium chloride is $$801^\circ\mathrm{C}.$$

Question 17

A sample of gold has a mass of $$19.3\ \mathrm{g}$$ and a volume of $$1.00\ \mathrm{cm}^3. $$What is the specific gravity of gold?

Accepted Answer

$$19.3$$

Question 18

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

Accepted Answer

A silver spoon tarnishing

Question 19

A student measures the length of a pencil as $$12.30\ \mathrm{cm}$$ and the width as $$1.2\ \mathrm{cm}. $$What is the area, reported with the correct number of significant figures?

Accepted Answer

$$15\ \mathrm{cm}^2$$

Question 20

Which of the following statements about states of matter is correct?

Accepted Answer

Liquids have a definite volume but no definite shape.

Study Guide: Measurements, Matter, and Energy (Chapters 2 & 3)

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