How many moles of nitrogen, n, are in 82.0 g of nitrous oxide, n2o?

Answer : The number of moles of nitrogen present in nitrous oxide are 3.72 moles.

Explanation : Given,

Mass of  = 82.0 g

Molar mass of = 44 g/mole

First we have to calculate the moles of .

Now we have to calculate the moles of nitrogen in nitrous oxide.

In nitrous oxide , there are 2 moles of nitrogen and 1 mole of oxygen.

As, 1 moles of contains 2 moles of nitrogen

So, 1.86 moles of contains of nitrogen

Therefore, the number of moles of nitrogen present in nitrous oxide are 3.72 moles.

its first and third is your answer i did the qustion the fourth isnt right