Question

How many moles of nitrogen, N, are in 76.0 g of nitrous oxide, N2O?

Answer 1

If the balanced equation reads:

2N2 + O2 ———> 2N2O

You should have 1.72 moles of N2.

Answer 2

Moles of N = 3.45

Step-by-step explanation:

Given:

Mass of N2O = 76.0 g

To determine:

Moles of N present in the given mass of N2O

Step-by-step explanation:

Based on the formula stoichiometry:

1 mole of N2O contains 2 moles of N

Now, 1 mole of N2O = 44.0 g (i.e. the molar mass of N2O)

44.0 g of N2O contains 2 moles of N

Therefore, moles of N in 76.0 g of N2O would be:

=
`= (76.0 g \ N2O *2\ moles\ N)/(44.0g\ N2O) =3.45\ moles`