How many milligrams of sodium azide will produce 8.35 Liters of N2 at STP???
2NaN3 ==> 2Na + 3N2
mols N2 = 8.35/22.4L = ?
?mols N2 x (2 mol NaN3/3 mols N2) = ? mols N2 x (2/3) = ?
Then grams NaN3 = mols NaN3 x molar mass NaN3 and convert grams to mg.