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9 May, 02:31

How many C atoms are there in 5.25 grams of a compound containing 92.26% C and 7.74% H?

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  1. 9 May, 02:58
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    Take 5.25 grams and give it proportionally to the carbon

    0.9226 * 5.25 grams = 4.84 grams Carbon

    Find the number of moles

    (4.84 grams carbon) / (12.01 grams/mol) = 0.403 moles Carbon

    The number of atoms in a mole of a substance is called Avogadro's number.

    There are 6.022 * 10^23 atoms in one mole of anything

    (0.403 moles Carbon) * (6.022 * 10^23 atoms/mole) = 2.43 * 10^23 atoms of Carbon
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