2 what is the maximum size of airbag in litres that can be

Question

The inflation mechanism of some automobile airbags contains a solid mixture of sodium azide, NaN₃(s), potassium nitrate, KNO₃(s) and silicon dioxide, SiO₂(s).  The chemical processes that occur during inflation of the airbag are described as follows. An electrical discharge initiates the decomposition of NaN₃ into sodium, Na(s) and nitrogen, N₂(g).  Because Na is very reactive, KNO₃ is present to react with Na to yield K₂O(s), Na₂O(s) and some additional N₂.  Because K₂O and Na₂O are also very reactive, SiO₂ is present to react with K₂O and Na₂O to yield K₂O₃Si(s) and Na₂O₃Si(s), respectively (both of which not reactive and nontoxic).  The N₂ generated in two of the reactions described above is what inflates the airbag.

1) If 100 g of NaN₃ is required to inflate a particular air bag, determine the masses (in grams) of KNO₃ and SiO₂ required so that all of the Na, Na₂O and K₂O produced are completely eliminated.

2) What is the maximum size of airbag (in litres) that can be inflated using 100 g of NaN₃ at 25.0 °C and 101 kPa? Assume that all of the chemical reactions that occur during inflation of the airbag are complete.