A kilogram weighs (at the earth's surface, e. g., the grocery store) approximately: a. 5.5 pounds
b. 1.5 pound
c. 10 pounds
d. 2.2 pounds

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?