Worksheet: Density Name KEY

[Pages:1]Worksheet: Density

Name________K_E_Y_________

Given a mass of 14 g and a volume of 28 mL, calculate the

density.

D = m = 14 g = 0.50 g

V 28 mL

mL

What is the mass of an object with a density of 4.0 g/cm3 that displaces 3.0 cm3 of water?

m = D ! V = 4.0 g ! 3.0 cm3 = 12 g cm3

Given that the density of iron is 11.35 grams per centimeter cubed, what would be the volume of a 1.1 gram piece of iron?

V = m = 1.1 g = 0.097 cm3 D 11.35 g cm3

Find the density of a block with a length of 8.0 cm, a width of

4.0 cm, a height 2.0 cm, and a mass of 32 g. Would this block

float or sink in water?

V = 8.0 cm ! 4.0 cm ! 2.0 cm = 64 cm3

D = m = 32 g = 0.50 g

V 64 cm3

cm3

Since the density of the block is less than the density of water, the block would float in water.

You have two pieces of jewelry. One of them is supposed to be

pure silver. The first piece has a mass of 20.0 g and the other

piece has a mass of 44.0 g. Both pieces displace 4.0 mL of water. Silver has a density of 10.5 g/cm3. Which piece is

actually silver?

4.0 mL = 4.0 cm3

D= m V

D1 =

20.0 g 4.0 cm3

= 5.0

g cm3

D2 =

44.0 g 4.0 cm3

=

11

g cm3

The 44.0 g piece is silver, because its density is the closest to silver's density.

CHEMISTRY: A Study of Matter

? 2004, GPB

2.14a

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