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JAMB - Chemistry (1985 - No. 38)
0.499g 0f CuSO
4
.xH
2
O when heated to constant weight gave a residue of 0.346g. the value of x is? (Cu = 63.5, S = 32.0, O = 16, H = 1)
0.5
2.0
3.0
4.0
5.0
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