2. Calculate the percentage mass of water in copper sulphate
crystals (CuSO4.5H20) (Cu = 64, S = 32, 0 = 16)
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Answer:
0 because easter we can see
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mass % a compound=mass of that compound in solution/total mass of the solution
= 5{2(1.008)+16.00}/5{2(1.008)+16.00}+64+32+4(16)
= 5(18.02)/5(18.02)+96+64
=5(18.02)/5(18.02)+160
=90/90+160
=90/250
=0.36 %
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