Question

Sodium azide, NaN₃, os used in the air bags of automobiles. What is the volume of N₂ gas at 25oC and 1.0 atm released from 100 g of NaN₃.

The equation for this chemical reaction is

2 NaN₃(s) => 2 Na(s) + 3 N₂.
The molar mass of NaN₃ is 65.02 g/mol

	1.	38 L
	2.	45 L
	3.	56 L
	4.	100 L

Answer 1

moles of NaN3 = 100 g/65.02 g/mol = 1.538 mol

moles of N2 gas = 1.538 x 3/2 = 2.307 mol

Volume of N2 gas = nRT/P

                          = 2.307 x 0.08205 x 298/1

                          = 56 L

Answer : 3. 56 L