Calculate the percentage of oxygen in MgSO4.7H2O (atomic weights , Mg=24,S=32,O=16,H=1) (B) Balance the given equation-------------------------NH3+Cl2 ---NCl3+ HCl
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Answer:
Relative molecular mass of MgSO
4
.7H
2
O
=24+32+(16×4)+7(2+16)
=24+32+64+126=246
26g of Epsom salt contains 126g of water of crystallisation.
Hence, 100g of Epsom salt contains 100×126/246
The % of H
2
O in MgSO
4
.7H
2
O=51.2
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