What mass of nitrogen is required to react with 16 grams of oxygen?

14g

Explanation:

N2 + 2O2 = > 2 NO2

Molar mass of O2 = 32g/mol

No of mol = 16/32 = 0.5 mol

2 moles of Oxygen react with 1 mol of N2

1 mol of oxygen react with X mol of N2

X = 0.5mol

Molar mass of N2 = 28g/mol

No of mol = mass/molar mass

Mass = 0.5 * 28 = 14g.