[crazyloser7]

What mass (in grams) of carbon dioxide gas would occupy a volume of 3.25 L at 2.50 atm and 40.0oC?

[jcaron2]

Use the ideal gas law: pV=nRT

You're given p, V, and T, and R is a constant (). All you have to do is solve for n to get the number of moles, then multiply by the molecular weight to get the mass in grams.

Just make sure you convert the temperature to Kelvin.

[Unknown008]

One small detail, pressure is most of the time denoted by capital P. :)

Small p is usually used for momentum.

But here, it's understood that p is pressure.

[jcaron2]

I knew it! I first wrote it with a capital P, but then couldn't remember if R was traditionally small or capital, so I went to the Wikipedia page, and they used small p and capital R. :)