How do you calculate the molar mass of a compound?

Calculate the molar mass of the compound?

  • A solution containing 3.23 grams of an unknown compound dissolved in 100.0 grams of water freezes at -0.97°C. The solution does not conduct electricity. Calculate the molar mass of the compound. (The molal freezing point depression constant for water is 1.86°C kg/mol) Then determine the molecular formula for the compound if elemental analysis of this unknown compound yields the following percentages by weight H=9.74%; C=38.70%; O=51.56%.

  • Answer:

    1 mol = 6.022 E23

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