If 34.2 grams of lithium react with excess water, how many liters of hydrogen gas can be produced at 299 Kelvin and 1.21 atmospheres? Show all of the work used to solve this problem.

Question

2 Li (s) + 2 H2O (l) yields 2 LiOH (aq) + H2 (g)

Answer 1

mols Li = grams/atomic mass
Using the coefficients in the balanced equation, convert mols Li to mols H2.
Use PV = nRT, substitute the conditions and mols and solve fr V in liters.