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8 March, 06:59

What molality of pentane is obtained by dissolving 15 g pentane, c5h12, in 245.0 g hexane, c6h14?

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  1. 8 March, 10:17
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    Answer

    The molality of pentane will be be 0.84 Molality

    Data given

    mass of pentane = 15g molar mass of pentane = 72.15 mass of solvent (hexane) = 245.0 g = 0.245 Kg

    Solution

    Molality = (given mass : molar mass) : 1 Kg of solvent Molality = (15 : 72.15) : 0.245 Kg Molality = 0.84
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