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14 November, 05:23

There are 43.2 g of carbon to 14.4 g of hydrogen in a sample of methane (CH4). What percent of 37.8 g of methane is carbon?

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  1. 14 November, 07:06
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    Using the law of constant proportions which says that within the same compound, elements exist in fixed ratios.

    Therefore; we can use the ratio of total mass to the mass of carbon, to determine the amount of carbon in another sample.

    Mass C / Mass CH4 = Mass C / Mass CH4

    43.2 g / 57.6 g = Mass C / 37.8 g

    Mass C = 37.8 g * 43.2 g / 57.6 g

    = 28.35 g

    Hence; the percentage of carbon will be;

    = (28.35 / 37.8) * 100%

    = 75 %

    Thus; 75% of 37.8 g of methane is carbon
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