Answer
There is a total of 0.0582 mole on ibuprofen in 12.0 g of that.
Work Step by Step
1. As we have calculated in 7.74a, the molar mass of ibuprofen is equal to: 206.2 g/mole. Therefore, these are the conversion factors:
$ \frac{1 \space mole \space (C_{13}H_{18}O_2)}{ 206.2 \space g \space (C_{13}H_{18}O_2)}$ and $ \frac{ 206.2 \space g \space (C_{13}H_{18}O_2)}{1 \space mole \space (C_{13}H_{18}O_2)}$
2. Calculate the number of moles $(C_{13}H_{18}O_2)$
$ 12.0g \times \frac{1 mole}{ 206.2g} = 0.0582 \space mole$
