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9 October, 13:56

Caffeine's molecular formula is c8h10n4o2. the molar mass of caffeine is 194g/mol. what is the percentage of carbon in caffeine

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  1. 9 October, 17:11
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    The molecular formula of Caffeine is C₈H₁₀N₄O₂

    the mass of 1 mol of caffeine - 194 g

    In 1 mol of caffeine, mass of C is - 12 x8 = 96 g

    Since 1 mol - 194 g, in 194 g of caffeine there's 96 g of Carbon

    To find the mass percentage of C

    Mass percentage = Mass of Carbon / mass of caffeine x 100%

    = 96 g / 194 g x 100

    = 49.5 %

    49.5 % of caffeine is composed of C.
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