need help on chemistry problems! please help!?

PrincessJ

New member
i have a chemistry test tomorrow.. im a bit scared because i have triuble with this chapter. it's like finding the mass, in grams of 22.8L of 02 at STP? or like what is the mass of 12.5L of CH4 at 1.50 atm and 289K?

these are some of the problems from the study guide.;.. but idk how to solve them
.
anyone know any sites that can help me with these kind of problems? thanks
 
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