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



BHow many atoms of ibuprofen are in the bottle?

Verified Answer :

Edufirst
AMoles

n = grams / molar mass

molar mass of C13H18O2:

1312g/mol + 181g/mol + 216g/mol = 206 g/mol

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

b) number of atoms = Avogadro number n = 6.02210^23 atom/mol 0.063 mol = 0.379 10^23 atoms = 3.8 10^22 atoms

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