Question

Calculate RAM of Cu and S from the percentage abundances of their isotopes Use your answers to find the RFM of Copper (II) Sulfide, Cus

63Cu- 69.1%
65Cu - 30.9%

32 Sulphur-95.0%
33 S-0.76%
34S-4.22%
35S-0.20%

Answer 1

63(0.691) + 65(0.309) = ?
S is done same way.