the volume of a gas is 22.5 ml at 22.o C at 0.974 atm, Whst will the volume be at 15.0 C and 0.993 atm?

I'm learning about the periodic tables and what each subject's configuration is. for example, hydrogen is 1s^1, but i don't understand how you get that. can someone me understand how to figure out how to figure this out? sorry if the question makes no sense, but it would really a lot if you could me understand! you so much if you can!