A 9.35 gram of ring with it's volume of 0.654 cm3 is an alloy of gold and with density of gold and silver respectively 19.3 g/cm3 and 10.5 g/cm3 assume there is no change in volume when pure metals are mixed. calculate volume of gold?

Answer 1

mass = volume x density or
vol = mass/density

vol Au + vol Ag = total vol

Let x = mass Au then
9.35-x = mass Ag
(x/19.3) + (9.35-x)/10.5 = 0.654
Solve for x = mass Au, then
x/19.3 = vol Au.