Question

Prevacid is used to treat gastroesophageal reflux disease (GERD). The chemical formula of Prevacid is C16H14F3N3O2S.a. What is the molar mass of Prevacid?370g/molb. What mass of fluorine is in 0.75 mol of Prevacid?0.12 molc. What number of carbon atoms is in 0.75 mol of Prevacid?12 atomsd. What is the mass of 4.25 3 1021 molecules of Prevacid?????

Answer 1

We have that the Prevacid has 4.25*10^21 molecules.

Remember the Avogadro's Law, which says that 1 mol of a substance equals 6.022*10^23 molecules.

Based on this number, we can do the conversion like this:

$4.25\cdot10^{21}molecules\cdot\frac{1\text{ mol}}{6.022\cdot10^{23}}=0.0071\text{ mol.}$

Using this result and the molar mass, you can find the mass:

$0.071\text{ mol Prevacid}\cdot\frac{370\text{ g Prevacid}}{1\text{ mol Prevacid}}=26.27\text{ g Prevacid.}$

Then, the mass of 4.25*10^21 molecules of Prevacid is 26.27 g.*10