Question

Ibuprofen, the anti-inflammatory ingredient in Advil, has the formula C13 H18 O2. What is the molar mass of ibuprofen? How many molecules are in 0.200 mole of ibuprofen?

Answer 1

`206g//mol`

`1.2046xx10^23` molecules

Explanation:

To find the molar mass of the compound, simply add the molar masses of all the individual atoms that make up 1 molecule of the compound.

`therefore M_r=(13xx12)+(18xx1)+(2xx16)`

`=206g//mol`.

`1` mole contains `6.023xx10^23` particles.

Hence by ratio and proportion, `0.2mol` contains `1.2046xx10^23` molecules.