What is the voltage of the electrochemical cell written as: cu(s) i cu? t(aq) il mg2+(aq) i mg(s)? - apex a. 2.03 v b. -2.71 v c. 2.71 v d. -2.03 v

Used the balanced equation 2h2+ o2 - -> 2h2o. if you have 7.2 grams of o2 , how many grams of h2o can you produce ?

The excretory system,need answers for all: )

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?