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a
41.59 g
b
415.9 g
c
4.159 g
d
0.4159
answer is C.
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Detailed Solution
[ ·: Molecular weight of CuSO4⋅5H2O=63.5+32+64+90=249.5]6 x 1023 molecules has weight=249.5gm1 x 1022 molecules has weight =249.5×1×10226×1023=41.58×10−1=4.158.