That's assuming you are asked for volume at STP and assuming you know what STP means. STP has no one, accepted definition and T/p values used depend on the application, defining body and so on. See wikipedia article on STP for details.
The most general approach is to use ideal gas equation, pV=nRT. Using 22.4L is only a shortcut, one that can give dangerously wrong answer.
Thanks a lot Renge. I knew it was a constant I just couldn't find the constant on google. I best memorize that number.
Borek this is real basic chemistry we're doing at the moment the teacher wrote that constant (22.4L) on the board I just forgot it. It was STP I forgot to mention that. I'm gonna learn that ideal gas equation though because chemistry is the field I'm planning on getting into. Thanks.
I have a question related to this thread. So if the STP of any gas is 22.4L per mole, all you have to do is to multiply 22.4L with the number of moles of the specified gas? High-school level chemistry is what I'm doing, so as of right now I need not learn that equation...