Why did you want the metals to be clean or polish before you tested them for electrical conductivity

How many moles of al3+ ions are in 1.25 moles of al2o3

What is one real world example of a colligative property?

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?