Question 1

Which of the following best describes a chemical change?

Accepted Answer

Iron rusting when exposed to air

Question 2

A sample of matter has a definite volume but takes the shape of its container. Which state of matter is this?

Accepted Answer

Liquid

Question 3

Which of the following is a homogeneous mixture?

Accepted Answer

Salt water

Question 4

Which of the following is the correct chemical symbol for sodium?

Accepted Answer

Na

Question 5

How many significant figures are in the measurement 0.00450 mL?

Accepted Answer

3

Question 6

Convert 0.0026 g of phosphorus to milligrams (mg).

Accepted Answer

$$2.6 mg$$

Question 7

A patient has a body temperature of $$107\ ^\circ\mathrm{F}. $$What is this temperature in Celsius?

Accepted Answer

$$41.7\ ^\circ\mathrm{C}$$

Question 8

Which of the following is the correct scientific notation for 0.000000120 m?

Accepted Answer

$$1.20 	imes 10$$^{-7}$$ m

Question 9

A 95 kg mass of water is heated from $$15\ ^\circ\mathrm{C} to$$ $$40\ ^\circ\mathrm{C}. $$How many calories are required? (Specific heat of water = $$1.00\ \mathrm{cal}/(\mathrm{g} \cdot ^\circ\mathrm{C}))$$

Accepted Answer

$$2.5 	imes 10^6$ cal

Question 10

Which of the following is a derived SI unit?

Accepted Answer

Gram per cubic centimeter (g/cm$$^3)$$

Question 11

A child is 21.5 inches long at birth. What is this length in centimeters? (1 in = 2.54 cm)

Accepted Answer

$$54.6 cm$$

Question 12

Which of the following statements about density is correct?

Accepted Answer

Density is mass divided by volume.

Question 13

A sample of isopropyl alcohol has a mass of 25.0 g and a density of 0.7855 g/mL. What is its volume?

Accepted Answer

$$31.9 mL$$

Question 14

Which of the following is an example of a heterogeneous mixture?

Accepted Answer

Chocolate chip cookies

Question 15

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

Accepted Answer

$$K = ^\circ\mathrm{C} + 273.15$$

Question 16

A patient requires an injection of 0.012 g of a drug available as a 15 mg/mL solution. How many mL should be administered?

Accepted Answer

$$0.80 mL$$

Question 17

Which of the following is NOT a physical property?

Accepted Answer

Reactivity with acid

Question 18

Which of the following is the correct conversion factor for pounds to grams?

Accepted Answer

$$1\ \mathrm{lb} = 454\ \mathrm{g}$$

Question 19

Which of the following is an example of an exact number?

Accepted Answer

1 foot = 12 inches

Matter and Measurements: Foundations of General Chemistry

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