Question

Ajutați ma va rog, dau coroana​

Answer 1

Răspuns:

MCuSO4*5H2O = 160+90 = 250g/mol Manhidru = 160g/mol

250g CuSO4*5H2O.....160g CuSO4.......90g H2O

50g CuSO4*5H2O.....xg CuSO4......yg H2O

x = 160*50/250 = 32g CuSO4

y = 90*50/250 = 18g H2O

md = 32g

ms = 250+50 = 300g

C = md/ms*100 = 32/300*100 = 10,66%

Explicație:

Succes!