How many moles of Neon gas would occupy 145.5 Liters of space at STP

Also what mass is that?


Thanks for any help!

Well. So this problem is just finding out properties of a gas at a snapshot in time, not comparing two different times, so you're going to use the ideal gas law.

So you are going to start out with 145.5L, 273k, and 1 atm, then moles is represented by the variable n. You are going to plug those numbers into that big fancy equation, then solve for n. That will give you the number of mols. (Oh, btw, because of the way the units cancel, they MUST be in atmospheres, liters, and Kelvin)

After you get mols, it's a simple stoich problem to go from mols to grams of Neon gas.