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18 September, 19:24

If the chemical analysis of a 10.000 g sample of oil of wintergreen shows that it consists of 6.320 g of carbon, 0.530 g of hydrogen, and 3.16 g of oxygen. What is the simplest formula for oil of wintergreen?

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  1. 18 September, 21:07
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    The simple formula for oil of wintergreen is C8H8O3

    calculation

    Step 1: calculate the moles each element present in the oil of wintergreen.

    moles = mass/molar mass

    moles of carbon (C) = 6.320g / 12.0 g/mol = 0.527 moles

    moles of Hydrogen (H) = 0.530 g / 1 g/mol = 0.530 moles

    moles of oxygen (O) = 3.16 g / 16 g/mol = 0.198 moles

    Step 2: calculate the mole ratio (by dividing each mole by smallest mole=0.198 moles)

    =for carbon (c) = 0.527/0.198 = 2.7

    for hydrogen (H) = 0.530 / 0.198 = 2.7

    for oxygen (O) = 0.198/0.198 = 1

    Step 3: multiply each mole ratio by 3 to remove the decimal

    = for C = 2.7 x3 = 8

    for H = 2.7 x3 = 8

    for O = 1 x3 = 3

    therefore the simple formula is C8H8O3
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