# How many moles of nitrogen in a mass of 14*g of dinitrogen gas?

Jul 19, 2017

Well, you got half a mole of dinitrogen gas........

#### Explanation:

All we do is solve the quotient,

$\text{Number of moles"="Mass of stuff"/"Molar mass of stuff}$,

we know that dinitrogen is a diatomic gas, with a molar mass of $28.0 \cdot g$ (in fact ALL of the element gases, save the Noble Gases are diatomic)....

And $\text{no. of moles} \equiv \frac{14.0 \cdot \cancel{g}}{28.0 \cdot \cancel{g} \cdot m o {l}^{-} 1} = \frac{0.50}{\frac{1}{m o l}} = 0.50 \cdot m o l$.

And the given quotient gives us an answer in $m o l$ as required.

How many nitrogen ATOMS do we have in this molar quantity?