Question

The radius of solid gold sphere is 0.25cm. If density of gold is 9.5/cc. Calculate it's mass.

Answer 1

Volume = 4/3 π r³ = 4/3 π x 1/64 = 3π /16 = 0.58875 cm³

mass = volume x density  = 0.58875 x 9.5 = 5.593125 g

Answer 2

calculate the volume. Then use the relation:
density=Mass/Volume.
You will get it.
THANK YOU.