Whose good at chemistry? xD What mass of Xe is needed to fill a 400 L tank with Xe gas and produce a pressure of 20300 kPa at 25 °C? Assume ideal behavior.

a.) 429.5 kg Xe
b.) 0.4295 g Xe
c.) 900 kg Xe
d.) 429.5 g Xe​

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?