Automotive air bags inflate when sodium azide decomposes explosively to its constituent elements:
$2 \mathrm { NaN } _ { 3 }$ (s)? 2Na(s)+ $3 \mathrm {~N} _ { 2 }$ (g) How many moles of $\mathrm { N } _ { 2 }$ are produced by the decomposition of 2.54 mol of sodium azide?

Question

Automotive air bags inflate when sodium azide decomposes explosively to its constituent elements: 
$2 \mathrm { NaN } _ { 3 }$ (s)? 2Na(s)+ $3 \mathrm {~N} _ { 2 }$ (g) How many moles of $\mathrm { N } _ { 2 }$ are produced by the decomposition of 2.54 mol of sodium azide?

Quizplus · Accepted Answer

According to the balanced equation, 2 moles of NaN3 give 3 moles of N2. Therefore, 2.54 moles of NaN3 will give (2.54 mol / 2 mol) x 3 mol N2 = 3.81 moles of N2. Therefore, the correct answer is choice C.

Automotive Air Bags Inflate When Sodium Azide Decomposes Explosively to Its