Air bags are activated when a severe impact causes a steel ball to compress a spring and electrically ignite a detonator cap. This causes sodium azide (NaN3) to decompose explosively according to the following reaction.

2 NaN3(s) 2 Na(s) + 3 N2(g)
What mass of NaN3(s) must be reacted to inflate an air bag to 65.5 L at STP?


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