Q: A sample of an unknown metal has a density of $2.14\ \text{g/cm}^3$. What is its density in $\text{kg/m}^3$?

$2.14 \times 10^3\ \text{kg/m}^3$

Q: Which of the following conversions is correct for expressing $1\ \text{g/cm}^3$ in $\text{kg/m}^3$?

$1\ \text{g/cm}^3 = 1000\ \text{kg/m}^3$

Q: Which of the following is the correct rearrangement of the density formula to solve for mass?

$\text{mass} = \text{density} \times \text{volume}$

Question 1

Which of the following best defines density?

Accepted Answer

The amount of mass per unit of volume.

Question 2

Given the formula for density $	ext{Density} = \frac{	ext{mass}}{	ext{volume}}$, what are the typical units for density when measuring solids and liquids?

Accepted Answer

$	ext{g/cm^3}$

Question 3

A sample of an unknown metal has a density of $2.14\ 	ext{g/cm}^3$. What is its density in $	ext{kg/m}^3$?

Accepted Answer

$2.14 	imes 10^3\ 	ext{kg/m}^3$

Question 4

If the density of blood is $1.060\ 	ext{kg/L}$, how many grams of Pb would be found in $400.0\ 	ext{mL}$ of blood at $0.80\ 	ext{ppm}$?

Accepted Answer

$0.339\ 	ext{g}$

Question 5

Which of the following conversions is correct for expressing $1\ 	ext{g/cm}^3$ in $	ext{kg/m}^3$?

Accepted Answer

$1\ 	ext{g/cm}^3 = 1000\ 	ext{kg/m}^3$

Question 6

A gas has a density of $1.25\ 	ext{g/L}$. What is its density in $	ext{kg/m}^3$?

Accepted Answer

$1.25\ 	ext{kg/m}^3$

Question 7

Which of the following statements about density is FALSE?

Accepted Answer

Density is independent of temperature for all substances.

Question 8

A cube of metal has a mass of $54.0\ 	ext{g}$ and a volume of $20.0\ 	ext{cm}^3$. What is its density?

Accepted Answer

$2.70\ 	ext{g/cm}^3$

Question 9

Which real-world scenario best illustrates the importance of density?

Accepted Answer

Determining whether an object will float or sink in water.

Question 10

A chemist needs to prepare $250.0\ 	ext{mL}$ of a solution with a density of $0.850\ 	ext{g/mL}$. What is the total mass of the solution?

Accepted Answer

$212.5\ 	ext{g}$

Question 11

If a liquid has a density of $0.789\ 	ext{g/mL}$, what volume would $15.0\ 	ext{g}$ of this liquid occupy?

Accepted Answer

$19.0\ 	ext{mL}$

Question 12

Which of the following is the correct rearrangement of the density formula to solve for mass?

Accepted Answer

$	ext{mass} = 	ext{density} 	imes 	ext{volume}$

Density: Concepts, Calculations, and Applications

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