How many #N# atoms are there in one mole of #N_2#?
You know that one molecule of nitrogen gas,
Now, a mole is simply a very, very large collection of particles. In order to have one mole of things, let's say particles, you need to have
So, in one mole of nitrogen gas you have
#6.022 * 10^(23)color(red)(cancel(color(black)("molecules N"_2))) * (color(blue)(2)color(white)(a)"atoms of N")/(1color(red)(cancel(color(black)("molecule N"_2)))) #
# = 1.2044 * 10^(24)"taoms of N"#
Alternatively, you can express this as