Whats molar mass of N?

1 Answer
Dec 8, 2015

The molar mass of nitrogen (N) is approximately #14.01# grams per mole of nitrogen atoms.


Molar mass is the quantity of an element in grams for every one mole of atoms of that element. Numerically, it's the same as the element's atomic mass in units of amu (atomic mass units).

A mole, or mol for short, is a quantity of any given thing that is equal to #6.02214 * 10^23# particles. This number, #6.02214 * 10^23#, is called Avogadro's number and is very useful when finding molar mass and converting between grams, moles, and particles.

Using a periodic table, we can find that nitrogen has an atomic mass of about #14.01# amu. Numerically, this is the molar mass of nitrogen. It means when you have one mole of nitrogen, it is equivalent to about #14.01# grams of nitrogen, and it is also equivalent to about #6.02214 * 10^23# nitrogen atoms:

14.01 g N = 1 mol N atoms = #6.022 * 10^23# N atoms

So all we have to do now is use the correct units, which would be grams per mole, or g/mol. This makes sense because there are about 14.01 grams of nitrogen for every 1 mol of nitrogen, using our ratios above.