The following equation represents a laboratory preparation for oxygen gas: 2KClO3(s)→ 2KCl(s) + 3O2(g) How many moles of O2 form if 3.0 mol of KClO3 are totally consumed?

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?