posted by Sven .
How many grams of LiH are needed to fill a 3.3 L life belt with hydrogen gas at 0.93 atm and 28.5°C?
Use PV = nRT and solve for n. Then use the stoichiometry procedure to solve for grams LiH. Here is the stoichiometry procedure. http://www.jiskha.com/science/chemistry/stoichiometry.html