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How many moles of carbon are in 5.2 moles of C7H18?

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  1. 29 May, 00:13
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    There is a shortcut to this Chem question. simply look at this problem as if it were a cooking recipe. you have 7 parts Carbon and 18 Parts Hydrogen for a total of 25 parts. Simply divide 5.2 by 25 then multiply by 7 to get your answer.

    (5.2 / 25) 7 = 1.456 moles
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