How many grams of methane gas (ch4) need to be combusted to produce 11.8 l water vapor at 1.85 atm and 304 k? show all of the work used to solve this problem.
ch4 (g) + 2o2 (g)yields co2 (g) + 2h2o (g)
use pv=nrt
r = 0.0821 l atm/mol k

Aballoon inflated with three breaths of air has a volume of 1.7 l. at the same temperature and pressure, what is the volume of the balloon if five more same-sized breaths are added to the balloon?

A50.0 ml sample of gas at 20.0 atm of pressure is compressed to 40.0 atm of pressure at constant temperature. what is the new volume? 0.0100 ml 0.325 ml 25.0 ml 100. ml

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!