Question

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

Answer 1

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

Explanation:

All we do is solve the quotient,

`"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*g` (in fact ALL of the element gases, save the Noble Gases are diatomic)....

And `"no. of moles"-=(14.0*cancelg)/(28.0*cancelg*mol^-1)=0.50/(1/(mol))=0.50*mol`.

And the given quotient gives us an answer in `mol` as required.

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