Question

How many moles are in 2. 5 g of N2? 0. 089 moles 0. 18 moles 1. 3 moles 11 moles.

Answer 1

moles = mass divided by molar mass

Molar mass of Nitrogen gas (N2) = 14*2 = 28 g/mol

Mass of Nitrogen gas = 5g

Moles = 5/28

Moles = 0.18 (rounded)