Unit of Measure: Quiz 9 – Answers

1) 8.6 g/cm^{3}

2) 1.6 g/cm^{3}

3) 21.3 g/cm^{3}

4) 65 g

5) 129.6 g

6) 2400 g

7) 115 g

8) 4.3 g/cm^{3}

9)

a) 110.4 g

b) 22.8 g

c) 3.1 g/cm^{3}

10) 4.08 g/cm^{3}

**Working**

**Questions**

You may use a calculator in for this quiz.

1) A 25 cm^{3} piece of copper has a mass of 215 g. What is the density of copper? Give your answer in g/cm^{3}.

2) A block of magnesium has a mass of 102.4 g has a volume of 64 cm^{3}. What is the density of magnesium? Give your answer in g/cm^{3}.

3) A 6.4 kg block of platinum has a volume of 300 cm^{3}. What is the density of platinum? Give your answer in g/cm^{3} and give your answer to 1 decimal place.

4) Granite has a density of 2.6 g/cm^{3}. A lump of granite has a volume of 25 cm^{3}. What is the mass of the lump of granite?

5) I have a block of aluminium that has a volume of 48 cm^{3}. Aluminium has a density of 2.7 g/cm^{3}. What is the mass of this aluminium block?

6) I have a lump of steel that has a volume of 320 cm^{3}. Steel has a density of 7.6 g/cm^{3}. What is the mass of the lump of steel? Give your answer to two significant figures.

7) Ice has a density of 0.92 g/cm^{3}. What is the mass of an ice cube where each length is 5 cm?

8) The shape below is a cuboid made out of a substance.

The mass of the cuboid is 1.677 kg. What is the density of the substance? Give your answer in g/cm^{3}.

9) I compete in a running race and get a medal for finishing. The medal has two different parts; a metal part and a ribbon. The metal part of the medal has a volume of 24 cm^{3} and the metal that it is made out of has a density of 4.6 g/cm^{3}. The ribbon part of the medal has a density of 1.2 g/cm^{3} and a volume of 19 cm^{3}.

a) What is the mass of the metal part of the medal?

b) What is the mass of the ribbon part of the medal?

c) What is the overall density of the medal? Give your answer in g/cm^{3} and give your answer to 2 significant figures.

10) A wooden box contains plastic dominos. The density of the box with the dominos is 3.2 g/cm^{3} and the volume of the box and the dominos is 900 cm^{3}. The wooden box has a density of 0.9 g/cm^{3}. The dominos have a volume of 650 cm^{3}. What is the density of the dominos? Give your answer in g/cm^{3} and to 3 significant figures.