Which of the following solutions contains same molar concentration?

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166 g .K I per litre of solution

33.0 g (NH4)2SO4 in 200 mL solution

25.0 g CuSO4.5H2O in 100 mL solution

27 .0 mg Al3+ per mL solution.

answer is A.

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Detailed Solution

Mw of KI,NH42SO4,CuSO4⋅5H2O and Al3+, respectively, are, 166,132,250, and 27g mol−1.1. M=166×1000166×1000=1.0M2. M=33×1000132×200=1.25M3. M=25×1000250×100=1.0M4. M=27×10−3×100027×1=1.0M

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