CHEMISTRY- molality

a sucrose solution was prepared by dissolving 13.5g sucrose in enough water to make 100ml of solution. the density is 1.050gml. calculate molality

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  1. 13.5 g sucrose/molar mass = moles

    convert 100 mL to mass.
    mass = volume x density
    mass = 100 mL x 1.050 g/mL = ??g and convert to kg.
    Then molality = moles/kg solvent.

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  2. how do i get the mole fraction?

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