Question 1

Which principle is used to determine the volume of a non-geometric object when it is submerged in water?

Accepted Answer

Archimedes' Principle

Question 2

A scientist places a solid in a graduated cylinder containing 200 mL of water. The water level rises to 206 mL. If the mass of the solid is 0.45 g, what is its density in $$\mathrm{g/cm^3$}$$?

Accepted Answer

$$0.075\ \mathrm{g/mL}$$

Question 3

If an irregularly shaped object has a density of $$0.96\ \mathrm{g/cm^3$}$$ and displaces $$5.0\ \mathrm{mL} of $$water, what is its mass in milligrams?

Accepted Answer

$$4800\ \mathrm{mg}$$

Question 4

A graduated cylinder contains $$3.5\ \mathrm{mL} of $$water. After a metal object is submerged, the water level rises to $$5.8\ \mathrm{mL}. $$What is the volume of the object?

Accepted Answer

$$2.3\ \mathrm{mL}$$

Question 5

Why is water displacement a reliable method for measuring the volume of irregularly shaped objects?

Accepted Answer

It directly measures the volume of water displaced, which equals the object's volume.

Question 6

A student finds that a rock displaces $$12.0\ \mathrm{mL} of $$water and has a mass of $$30.0\ \mathrm{g}. $$What is the density of the rock in $$\mathrm{g/cm^3$}$$?

Accepted Answer

$$2.5\ \mathrm{g/cm^3$}$$

Question 7

If a scientist wants to determine the volume of a gold nugget, which of the following methods would be most appropriate?

Accepted Answer

Submerge the nugget in water and measure the volume displaced.

Question 8

A glass bead is dropped into a graduated cylinder containing $$10.0\ \mathrm{mL} of $$water. The water level rises to $$12.5\ \mathrm{mL}. If $$the bead has a mass of $$5.0\ \mathrm{g}$$, what is its density?

Accepted Answer

$$2.0\ \mathrm{g/cm^3$}$$

Question 9

Which of the following best describes the process of water displacement?

Accepted Answer

The amount of water moved out of the way when an object is totally submerged.

Question 10

A scientist measures the initial water level in a cylinder as $$15.0\ \mathrm{mL}. $$After adding a stone, the water level rises to $$18.7\ \mathrm{mL}. $$What is the volume of the stone?

Accepted Answer

$$3.7\ \mathrm{mL}$$

Question 11

If a scientist incorrectly reads the meniscus from above rather than at eye level, what type of error is most likely to occur?

Accepted Answer

Parallax error

Question 12

A student wants to find the mass of an object with a density of $$1.2\ \mathrm{g/cm^3$}$$ and a volume of $$4.0\ \mathrm{cm^3$}. $$What is the mass?

Accepted Answer

$$4.8\ \mathrm{g}$$

Question 13

Which of the following is NOT a reason why water displacement is used to measure volume?

Accepted Answer

It measures the object's mass.

Question 14

A scientist finds that a piece of wood floats in water and only partially displaces the water. What does this indicate about the wood's density?

Accepted Answer

The wood's density is less than that of water.

Question 15

A student measures the mass of a metal object as $$15.0\ \mathrm{g}$$ and its volume as $$3.0\ \mathrm{mL}. $$What is the density of the metal?

Accepted Answer

$$5.0\ \mathrm{g/mL}$$

Question 16

Which equation correctly relates mass, volume, and density?

Accepted Answer

$$\mathrm{Density} = \frac{\mathrm{Mass}}{\mathrm{Volume}}$$

Question 17

A scientist uses water displacement to measure the volume of a sample. What is the most important step to ensure accuracy?

Accepted Answer

Read the water level at eye level.

Question 18

A student submerges a plastic toy in water and observes no change in water level. What is the most likely explanation?

Accepted Answer

The toy is less dense than water and floats.

Question 19

If the initial water level in a graduated cylinder is $$7.0\ \mathrm{mL}$$ and after adding a stone it rises to $$10.5\ \mathrm{mL}$$, what is the volume of the stone?

Accepted Answer

$$3.5\ \mathrm{mL}$$

Question 20

A scientist wants to measure the density of a liquid. Which of the following steps is NOT necessary?

Accepted Answer

Submerge the liquid in water to measure displacement.

Density and Water Displacement: Measurement and Problem Solving in Chemistry

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