Look at the amount of energy it takes to remove a valence electron from He, Ne, Ar, Kr, and Xe compared to atoms in the same period (row). Based on what you know about ionization energy, why
what does that tell you about the tendency of these elements to react with other elements?

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?