Question 1

A piece of metal has a mass of 48.0 g. When placed in a graduated cylinder containing 25.0 mL of water, the water level rises to 33.0 mL. What is the density of the metal in $$\mathrm{g/cm^3$}$$?

Accepted Answer

$$6.0\ \mathrm{g/cm^3$}$$

Question 2

Which of the following statements about density is correct?

Accepted Answer

Density is the ratio of the mass of a substance to its volume.

Question 3

A patient receives 2.0 teaspoons of cough syrup. If the syrup has a density of $$1.20\ \mathrm{g/mL}$$ and $$1\ \mathrm{tsp} = 5.0\ \mathrm{mL}$$, what is the mass of syrup administered?

Accepted Answer

$$12\ \mathrm{g}$$

Question 4

A liquid has a density of $$1.32\ \mathrm{g/mL}. $$What is the volume, in mL, of a $$14.7\ \mathrm{g}$$ sample of this liquid?

Accepted Answer

$$11.1\ \mathrm{mL}$$

Question 5

Which of the following objects will float in water ($$\mathrm{D_{water} = 1.00\ g/mL}) at$$ $$4^\circC$$?

Accepted Answer

Cork ($$\mathrm{D = 0.26\ g/mL})$$

Question 6

A sample of ice has a mass of $$9.2\ \mathrm{g}$$ and a volume of $$10.0\ \mathrm{cm^3$}. $$What is its density?

Accepted Answer

$$0.92\ \mathrm{g/cm^3$}$$

Question 7

A nurse needs to prepare $$25.0\ \mathrm{mL} of a $$saline solution with a density of $$1.05\ \mathrm{g/mL}. $$What mass of solution should she measure?

Accepted Answer

$$26.3\ \mathrm{g}$$

Question 8

Which of the following best describes specific gravity?

Accepted Answer

The ratio of the density of a substance to the density of water at $$4^\circC.$$

Question 9

A student finds that a $$68.60\ \mathrm{g}$$ zinc object displaces $$9.5\ \mathrm{mL} of $$water. What is the density of zinc in $$\mathrm{g/cm^3$}$$?

Accepted Answer

$$7.2\ \mathrm{g/cm^3$}$$

Question 10

If a liquid has a specific gravity of $$0.85$$, what can you conclude about its density?

Accepted Answer

Its density is $$0.85\ \mathrm{g/mL} at$$ $$4^\circC.$$

Question 11

A gas sample has a mass of $$2.50\ \mathrm{g}$$ and occupies a volume of $$1.25\ \mathrm{L}. $$What is its density in $$\mathrm{g/L}$$?

Accepted Answer

$$2.00\ \mathrm{g/L}$$

Question 12

A patient is given $$15.0\ \mathrm{mL} of a $$medication with a density of $$0.80\ \mathrm{g/mL}. $$What is the mass of medication administered?

Accepted Answer

$$12.0\ \mathrm{g}$$

Question 13

Which of the following is NOT a correct unit for density?

Accepted Answer

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

Question 14

A $$20.0\ \mathrm{g}$$ sample of a metal is placed in a graduated cylinder containing $$30.0\ \mathrm{mL} of $$water. The water level rises to $$32.5\ \mathrm{mL}. $$What is the density of the metal?

Accepted Answer

$$8.0\ \mathrm{g/cm^3$}$$

Question 15

A laboratory technician needs to prepare $$100.0\ \mathrm{g} of a $$solution with a density of $$1.25\ \mathrm{g/mL}. $$What volume of solution should be measured?

Accepted Answer

$$80.0\ \mathrm{mL}$$

Question 16

Which of the following best explains why ice floats on water?

Accepted Answer

Ice has a lower density than liquid water.

Question 17

A $$50.0\ \mathrm{g}$$ sample of a substance has a specific gravity of $$2.00. $$What is its volume in $$\mathrm{mL}$$?

Accepted Answer

$$25.0\ \mathrm{mL}$$

Density and Measurement in GOB Chemistry

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