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5 October, 06:42

In a combustion reaction, 46.0g of ethanol reacts with 96.0 g of oxygen to produce water and carbon dioxide. If 54.0 g of water is produced, what mass of carbon dioxide is produced?

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  1. 5 October, 08:35
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    The basic law of mass conservation states that, the total mass of products of a chemical reaction should be equal to the total mass of reactants in the same reaction.

    Applying this law to the above problem, we find that:

    Total mass of reactants = 46 + 96 = 142 grams

    This means that the total mass of products (water + carbon dioxide) should be also 142 grams

    Since 52 grams of water is produced, therefore,

    mass of carbon dioxide = 142 - 52 = 90 grams
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