Automotive airbags inflate when sodium azide decomposes explosively to its constituent elements. How many grams of sodium azide are required to produce 24.4 L of nitrogen gas at standard temperature and pressure? 2NaN3 --> 2Na + 3N2 47.2 g of sodium azide

106.2 g of sodium azide

1.63 g of sodium azide

0.726 g of sodium azide

47.2 g of sodium azide

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number of particles.

To calculate the moles, we use the equation:

The balanced chemical reaction is:

According to stoichiometry :  

3 moles of are produced by = 2 moles of

Thus 1.09 moles of are produced by =  of

Mass of

Thus 47.2 g of sodium azide are required to produce 24.4 L of nitrogen gas at standard temperature and pressure