Question

вычислите массовые доли элементов CuSo4, Na3,PO4.

Answer 1

Mr(CuSO4)=64+32+4*16=160
W(Cu)=64/160=0.4=40%
W(S)=32/160=0.2=20%
W(O)=64/160=0.4=40%

Mr(Na3PO4)=3*23+31+4*16=164
W(Na)=69/164=0.42=42%
W(P)=31/164=0.19=19%
W(O)=64/164=0.39=39%