What is the mass of nh3 in a 80.0-cm3 sample that has a density of 0.92 g/cm3 and consists of 20% (by mass) nh3?

How many moles of gas are present if p=11 atm, v=12l, t=185k?

Mike and mitchell decide to have a foot race. they mark off a stretch of 100 yards, and recruit cindy to work the stopwatch. after running the race and looking at the results, cindy declared that mitchell was the fastest. so how did the boys times compare?

Calculate the molarity of each of the following solutions. part a) 0.12 mol of lino3 in 5.5 l of solution part b) 60.7 g c2h6o in 2.48 l of solution part c) 14.2 mg ki in 100 ml of solution