Automotive air bags inflate when a sample of sodium azide, NaN3, is very rapidly decomposed via the following reaction: __NaN3 __ Na(S) + __ N2(g)
What mass of sodium azide is required to produce 73.6 L of nitrogen gas at STP?

Liquid from a brewery fermentation contains 10% ethanol and 90% water. part of the fermentation product (50,000 kg/h) is pumped to a distillation column on the factory site. under current operating conditions, a distillate of 45% ethanol and 55% water is produced from the top of the column at a rate of one-tenth that of the feed. what is the composition of the waste "bottoms" from the still?