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14 October, 22:07

Determine how many grams of water are produced when burning 1.33 g of hexane, C6H14, as a component of gasoline in automobile engines. Assume excess oxygen is present

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  1. 14 October, 23:57
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    Combustion of hexane can be illustrated by the following reaction:

    2C6H14 + 19O2 ... > 12CO2 + 14H2O

    From the periodic table:

    mass of hydrogen = 1 gram

    mass of oxygen = 16 grams

    mass of carbon = 12 grams

    Therefore:

    molar mass of hexane = 6 (12) + 14 (1) = 86 grams

    mass of water = 2 (1) + 16 = 18 grams

    From the balanced equation above:

    2 (86) = 172 grams of hexane produce 252 grams of water. To know the amount of water produced from 1.33 grams of hexane, all you have to do is cross multiplication as follows:

    amount of water = (1.33x252) / 172 = 1.9486 grams
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