1. A piece of pure gold (Au) has a volume of 50 cmWhat is its mass? Density of Some Metals
Metal
Density (g/cm3)
Copper
8.96 (g/cm)
Iron
7.87 (g/cm)
Lead
11.36 (g/cm)
Magnesium
1.74 (g/cm)
Silver
10.49 (g/cm)
Zinc
7.13 (g/cm)
A. 0.38 g
B. 2.63 g
C. 69.3 g
D.950 g

96.5g

Explanation:

Given parameters:

Volume of Au = 50cm³

Density of Au = 19.3 g/cm³

Unknown:

Mass of the  gold  = ?

Solution:

Density is the mass per unit volume of a compound.

 Density  =

 Mass  = density x volume

Insert the parameters and solve;

   Mass  = 19.3 g/cm³ x 50cm³  = 96.5g

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