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Submitted by Hemicarka5 on Thu, 03/27/2014 - 18:37
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Koliko se grama kristalne vode oslobadja pri zarenju 1kg plavog kamena CuSO4*5N2O?

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milicaradenkovic - Thu, 03/27/2014 - 19:37

Vec sam ti resila zadatak ne znam sta ti nije jasno ali evo resicu ti ga ponovo.

CuSO4*5H2O-------------------->CuSO4+5H2O

n(CuSO4*5H2O)=m/Mr=1000/250=4 mol

n(H2O)=5*n(CuSO4*5H2O)=5*4=20 mol

m(H2O)=n(H2O)*Mr=20*18=360 g

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Hemicarka5 - Thu, 03/27/2014 - 23:00

Hvala.