Chemistry Help! Ideal Gas law?

Question

What is the mass of 38.2 ml of dry air at STP?

I figure I need to use PV=nRT (solving for n)

[(760)(.0382)] / [(.0821)(273)]
= 1.30 mol (rounded)

but, I don't know where to go from there to finding the mass...

Any help is appreciated!

Answer 1

Try looking up examples in your text, notes or homework assignments. Some books have the odd number answers in the back to help you figure out the problems.