M(CuSO4*5H2O) = 250г/моль
M(H2O) = 18г/моль
W(H2O) = (18*5)/250 = 0,36 или 36%
Dano:
CuSO4*5H2O
ω(H2O)-?
1mol(CuSO4*5H2O)=64g+32g+64g+10g+80g=250g
5mol(H2O)=10g+80g=90g
ω(H2O)=90g/250g*100%=36%
