Răspuns:
MCuSo4*5H20=160+90=250g/mol
Manhidru=160g/mol
250g CuSo4*5H20......160g CuSo4.......90g
H20
50g CuSo4*5H20.....CuSo4.....yg H20
x=160*50/250=32g CuSo4
y=90*50/250=18g H20
md=32g
ms=250+50=300g
C=md/ms*100=32/100*100=10,66%
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