What is the mass, in grams, of ch4 gas in a 5. 00 l cylinder at a pressure of 781 torr and a temperature of 25. 0 °c?.

It depends on the subject for me. some exams are easier than others so i usually go through it and answer questions i know based on my general knowledge, then double check after. going through the lesson can a lot  because the exams can be  very lesson-specific, but sometimes they are ridiculously long so a lot of people don't take the time. i did find that, when i went through the lessons, i was making 100's on my exams vs strictly using + the internet and  i make 90's. 

C. junior college i hope this .