physics
posted by anon .
The British Sovereign coin is an alloy of gold and copper having a total mass of 7.988 g and is 22karat gold.
(a) Find the mass of gold in kg using that # of karats = 24 x (mass of gold)/(total mass).
(b) Calculate the volumes of gold and copper used to manufacture the coin.
(c) Calculate the density of the coin.

a. calculate using the formula
b. knowing the masses of copper and gold, and densities, find the volume
c. density=totalmass/totalvolume