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 change?

Accepted Answer

Burning a piece of paper

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 best describes a homogeneous mixture?

Accepted Answer

A glass of salt water

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 kinetic and potential energy is correct?

Accepted Answer

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

Question 7

A patient’s urine has a density of $$1.03\ \mathrm{g/mL}. $$What is the specific gravity of the urine?

Accepted Answer

$$1.03$$

Question 8

Which of the following is a physical property?

Accepted Answer

Boiling point

Question 9

A 50.0 g sample of a substance absorbs $$500\ \mathrm{cal} of $$heat, causing its temperature to rise from $$20.0\ ^\circ\mathrm{C} to$$ $$40.0\ ^\circ\mathrm{C}. $$What is the specific heat of the substance?

Accepted Answer

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

Question 10

Which of the following best describes the process of sublimation?

Accepted Answer

A solid changing directly to a gas

Question 11

A student adds $$2.50\ \mathrm{g} of $$salt to $$97.5\ \mathrm{g} of $$water and stirs until dissolved. Which of the following best describes the resulting mixture?

Accepted Answer

A homogeneous mixture

Question 12

Which of the following numbers has four significant figures?

Accepted Answer

$$0.004560$$

Question 13

A sample of ethanol has a density of $$0.789\ \mathrm{g/mL}. $$What is the mass of $$25.0\ \mathrm{mL} of $$ethanol?

Accepted Answer

$$19.7\ \mathrm{g}$$

Question 14

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

Accepted Answer

$$298.2\ \mathrm{K}$$

Question 15

A nurse needs to convert a patient's temperature from $$102.2\ ^\circ\mathrm{F} to $$Celsius. What is the patient's temperature in $$^\circ\mathrm{C}$$? (Use $$^\circ\mathrm{C} = ( ^\circ\mathrm{F} - 32 ) 	imes \frac{5}{9})$$

Accepted Answer

$$39.0\ ^\circ\mathrm{C}$$

Question 16

Which of the following best describes a physical change?

Accepted Answer

Water freezing to form ice

Question 17

A block of metal has a mass of $$150.0\ \mathrm{g}$$ and a volume of $$50.0\ \mathrm{mL}. If $$the density of water is $$1.00\ \mathrm{g/mL}$$, what is the specific gravity of the metal?

Accepted Answer

$$3.00$$

Question 18

Which of the following is a pure substance?

Accepted Answer

Salt (NaCl)

Question 19

A $$100.0\ \mathrm{g}$$ sample of water at $$20.0\ ^\circ\mathrm{C}$$ absorbs $$800.0\ \mathrm{cal} of $$heat. If the specific heat of water is $$1.00\ \mathrm{cal/(g\ ^\circ C)}$$, what is the final temperature of the water?

Accepted Answer

$$28.0\ ^\circ\mathrm{C}$$

Question 20

Which of the following best describes the state of matter in which particles are far apart and move independently of one another?

Accepted Answer

Gas

Study Guide: Chemistry and Measurements & Matter and Energy

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