m CuSO4*5 H2O=64u+32u+4*16u+5*18u=250 u
90u---x%
250u---100%
x=36%H2O
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m CuSO4*5 H2O=64u+32u+4*16u+5*18u=250 u
90u---x%
250u---100%
x=36%H2O