Question

10) How much atoms are present in 60 grams of CuSO4.5H20. (Cu = 63.5, S = 32, 0 = 16, H 69 = 1) a) 6 x 1023 atoms b) 0.05 x 1023 atoms c) 1.9 x 1023 atoms d) 30 x 1023 atoms 90 60​

Answer 1

Atomic mass for the material you want is 64(for Cu)+32(for S)+(16×4)(for O4)+(5×18)(for 5H2O). 6.022×10^23 atom is 250g. So 60g of that would contain 6.022×10^23×250/60 atoms.15-