What is the formula for the compound formed by Mg2+ and S2-?

How would the number of moles (n) of o2 change if the atmospheric pressure doubled but all other variables stayed the same

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?

Match each statement with the state of matter it describes