Question 1

Which of the following is the correct SI unit for measuring mass?

Accepted Answer

kilogram

Question 2

Convert 5.0 kg to grams. Use the correct number of significant figures.

Accepted Answer

$$5.00 	imes 10^3$ g

Question 3

What is $$4.56 	imes 10$$^{-3}$$ in decimal notation?

Accepted Answer

0.00456

Question 4

How many nanograms are in 1 milligram?

Accepted Answer

$$1 	imes 10^6$ nanograms

Question 5

A patient’s blood sample has a mass of 0.75 g and a volume of 0.50 mL. What is the density of the blood sample?

Accepted Answer

$$1.5 \ \mathrm{g/mL}$$

Question 6

How many significant figures are in the measurement 0.00450?

Accepted Answer

3

Question 7

A nurse needs to convert 2.5 L of IV fluid to milliliters. What is the correct value?

Accepted Answer

$$2.5 	imes 10^3$ mL

Question 8

A block of metal has a mass of 150 g and a volume of 50.0 mL. What is its specific gravity? (Assume the density of water is $$1.00 \ \mathrm{g/mL})$$

Accepted Answer

$$3.0$$

Question 9

Which of the following objects will float in water?

Accepted Answer

An object with a density of $$0.85 \ \mathrm{g/mL}$$

Question 10

A graduated cylinder contains 40.0 mL of water. After a stone is added, the water rises to 52.5 mL. If the stone’s mass is 30.0 g, what is its density?

Accepted Answer

$$2.40 \ \mathrm{g/mL}$$

Question 11

Which of the following is the correct scientific notation for 0.00082?

Accepted Answer

$$8.2 	imes 10$$^{-4}$$

Question 12

A sample of gasoline has a density of $$0.740 \ \mathrm{g/mL}. $$What is the mass of 250.0 mL of gasoline?

Accepted Answer

$$185 g$$

Question 13

Which prefix represents one-millionth ($$1/1,000,000) of a $$base unit?

Accepted Answer

micro-

Question 14

A medication is prescribed as 0.250 mg. How many micrograms is this?

Accepted Answer

$$250$$ \mu g

Question 15

Which calculation is correct for the sum $$4.56 + 2.1$$ using significant figures?

Accepted Answer

$$6.7$$

Question 16

A nurse needs to convert 0.0050 kg to milligrams. What is the correct value?

Accepted Answer

$$5.0 	imes 10^6$ mg

Question 17

A solution has a specific gravity of 1.10. What is its density in $$\mathrm{g/mL}$$?

Accepted Answer

$$1.10 \ \mathrm{g/mL}$$

Question 18

Which of the following is the correct conversion factor to change centimeters to meters?

Accepted Answer

$$1 \ \mathrm{m} = 100 \ \mathrm{cm}$$

Chemistry 102: Study Guide for SI Units, Measurements, and Density (Ch. 1–2)

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