How many grams of nitrogen are present in 2 moles of #HNO_3#?

1 Answer
May 4, 2016

Approx. 28 g.


In 2 moles of nitric acid there are 2 moles of hydrogen atoms, 6 moles of oxygen atoms, and 2 moles of nitrogen atoms. Since the molar mass of nitrogen (atomic nitrogen!) is #14.01*g#, we simply double the number. From where did I get the molar mass?