2KO2 + H2O → O2 + 2KOH Use the balanced equation to solve the stoichiometry problems below.
a. What mass of KO2 produces 235 g of O2?
b. How many moles of O2 can be removed by 12.3 L of KO2?

Given the following at 25c calculate delta hf for hcn (g) at 25c. 2nh3 (g) +3o2 (g) + 2ch4 (g) > 2hcn (g) + 6h2o (g) delta h rxn= -870.8 kj. delta hf=-80.3 kj/mol for nh3 (g), -74.6 kj/mol for ch4, and -241.8 kj/mol for h2o (g)