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Today, 14:25

You normally take 2 Ibuprofen (C13H18O2) when you have pain. Each one is 250 g. How many moles of ibuprofen do you take?

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  1. Today, 14:58
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    2.4mol

    Explanation:

    In order to calculate numbers of moles we have to divide the given mass by the molar mass of the substance (ibuprofen) n = m/M

    To calculate the molar mass we have

    C13 = 12*13 = 156

    H18 = 1*18=18

    O2 = 16*2 = 32

    Molar mass M = 153+18+32 = 206g

    Given the mass m = 250g per tablet

    Hence number of moles in one tablet is n = 250/206 = 1.2 mol

    Therefore the total number of ibuprofen you took is 1.2*2 (for the two tablets) = 2.4 moles
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