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An aqueous solution of ethanol has density `1.025 g/ mL` and it is 2 M. What is the molality of this solution ?A. `1.79`B. `2.143`C. `1.951`D. None of these

Answer» Correct Answer - B
`w_(B) = 2 xx 46 = 92 gm`
`w_(r) = rho xx V = 1.025 xx 1000 = 1025`
`w_(A) = 1025 - 92 = 933`
`m = (2)/(933) xx 1000 = 2.143`


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