Question

How many moles are in 2.2 grams of niacin?

Answer 1

0.01787019738 moles in 2.2 grams of niacin

Explanation:

Niacin's equation is C6H5NO2. To find the molar mass, we must add the individual atomic mass of each element.

Carbon: `12.01*6=72.06`

Hydrogen:`1.01*5=5.05`

Nitrogen:`14.01*1=14.01`

Oxygen:`15.999*2=32`

Total:`72.06+5.05+14.01+32=123.11`

We now know that the molar mass is 123.11. With this, we divide the number of grams by the molar mass:

Moles: `2.2/123.11=0.01787019738` moles

Good luck!