Answer to Question #169151 in General Chemistry for Dawson

Question

In a collision of sufficient force, automobile air bags respond by electrically triggering the explosive decomposition of sodium azide (NaN₃) to its elements. A 33.4−g sample of sodium azide was decomposed, and the nitrogen gas generated was collected over water at 26°C. The total pressure was 757.0 mmHg. How many liters of dry N₂ were generated? Do not answer in scientific notation.

Answer 1

1 mol NaN₃ forms 1,5 mol of N₂

33,4 g /65g/mol = 0,514 mol of NaN₃

0,514 mol of NaN₃ forms 0,771 mol of N₂

PV=nRT

V= (0,771 mol *8,314 J/mol*K * 299,15K)/100925Pa = 0,019 m³ = 19L