If an automobile air bag has a volume of 11.8L, what mass of NaN3 (in g) is required to fully inflate the air bag upon impact? @ STP?

Automobile air bags inflate following a serious impact. The impact triggers the following chemical reaction. 2NaN3(s)→2Na(s)+3N2(g) If an automobile air bag has a volume of 11.8L , what mass of NaN3 (in g) is required to fully inflate the air bag upon impact? Assume STP conditions. STP Conditions: 273.15K, 1.00bar show more Automobile air bags inflate following a serious impact. The impact triggers the following chemical reaction.
2NaN3(s)→2Na(s)+3N2(g)

If an automobile air bag has a volume of 11.8L , what mass of NaN3 (in g) is required to fully inflate the air bag upon impact? Assume STP conditions.

STP Conditions: 273.15K, 1.00bar
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