Question

How many moles of nitrogen, N, are in 88.0 g of nitrous oxide, N2O?

Answer 1

Number of moles ( of N20) = mass / molar mass = 88.0g / 44.01g/mole = 2 moles So, there's 2 moles of N20, and in every molecule there's 2 nitrogen atoms -> there's 4 moles of nitrogen in 88.0g of N20