Automotive air bags inflate when sodium azide decomposes explosively to its constituent elements: (s)→ 2Na(s)+ (g) How many moles of are produced by the decomposition of 1.25 mol of sodium azide?

Question

Automotive air bags inflate when sodium azide decomposes explosively to its constituent elements:  (s)→ 2Na(s)+  (g) How many moles of  are produced by the decomposition of 1.25 mol of sodium azide?

Quizplus · Accepted Answer

From the balanced equation, we can see that 2 moles of Na are produced for every 11 moles of N2.
So, moles of N2 produced = (11/2) * moles of Na produced
Given that 1.25 mol of sodium azide decomposes, which is equivalent to the production of 2*1.25 = 2.5 mol of Na.
Therefore, moles of N2 produced = (11/2) * 2.5 = 13.75/2 = 6.875
Rounding off to three significant figures we get 6.88.
Therefore, the answer is C) 1.88.

Automotive Air Bags Inflate When Sodium Azide Decomposes Explosively to Its