What group is more reactive than the alkaline earth metals

Nonmetal halogen family atmoic mass 35

Explain in detail of the four major scientific developments that spurred the formulation of the plate tectonics theory

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?