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15 February, 16:12

6. How many moles are represented by 11.5 g of C2H5OH?

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  1. 15 February, 16:34
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    n C2H5OH = 0.2496 mol

    Explanation:

    moles (n) = mass / molecular weight

    ∴ m C2H5OH = 11.5 g

    ∴ Mw C2H5OH = (2) (12.011) + (6) (1.00794) + 15.9994 = 46.069 g/mol

    ⇒ n C2H5OH = (11.5 g) / (46.069 g/mol) = 0.2496 mol C2H5OH
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