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8 April, 22:06

1. Ibuprofen, C13H18O2, is the active ingredient in many non-prescription pain relievers.

(a) If the tablets in a bottle contain a total of 13 g of ibuprofen, how many moles of ibuprofen are in the bottle?

Work

N = mass/mr

N=13/206.29g

N=0.0630n

(b) How many atoms of ibuprofen are in the bottle?

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Answers (1)
  1. 8 April, 22:53
    0
    A) Moles

    n = grams / molar mass

    molar mass of C13H18O2:

    13*12g/mol + 18*1g/mol + 2*16g/mol = 206 g/mol

    n = 13 g / 206 g/mol = 0.063 mol

    b) number of atoms = Avogadro number * n = 6.022*10^23 atom/mol * 0.063 mol = 0.379 * 10^23 atoms = 3.8 * 10^22 atoms
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Home » Biology » 1. Ibuprofen, C13H18O2, is the active ingredient in many non-prescription pain relievers. (a) If the tablets in a bottle contain a total of 13 g of ibuprofen, how many moles of ibuprofen are in the bottle? Work N = mass/mr N=13/206.29g N=0.
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