Ibuprofen (C13H18O2) is a nonprescription pain reliever. How many moles are in 15.0g? How many grams are in 0.152mol?

Stage in which a typical star has completely stopped fusion

How many grams of oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.

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?