chemistry
posted by hellogoodbie .
So here I am doing my HW worksheet on the ideal gas law/graham's law ad I have gotten to this one problem where I am totally stuck and confused. Please help me by telling me how to set this up and giving me tips, if necessary.
What is the mass (in grams) of ammonia gas (NH {tiny #3at the bottom}, 17g/mole contained in a 4.00 flask at 32.5 degrees Celsius and 1.6atm?

Answered below.

So is grams, n in the formula PV=nRT?
I think I am starting to understand this. 
No. n in the formula PV = nRT is the number of moles.
First you solve for n (number of moles). THEN you use the formula, moles = grams/molar mass to solve for grams (which is what the problem asks for). 
Oh! I think I understand now