Air bags in cars are inflated by the sudden decomposition of sodium azide (NaN3) by the following reaction.
2 NaN3(s) −→ 3 N2(g) + 2 Na(s)
What volume of N2 gas, measured at 1.31 atm and 87.0◦C, would be produced by the reaction of 74.0 g of NaN3?
Units of Liters!!
2 NaN3(s) −→ 3 N2(g) + 2 Na(s)
mols NaN3 = g/molar mass = 74.0/65 = about 1.14 but you should redo all of this.
1.14 mols NaN2 will produce 3/2 mol N2 = about 1.7 moles N2.
Then use PV = nRT. For n use YOUR revised value of n. R = 0.821 L*atm/mol*K, and use T in kelvin. K = 273 + celsius
Post your work if you get stuck.