Question

How many liters of oxygen gas can be produced if 28.7 grams of water decomposes at 294 Kelvin and 0.986 atmospheres? Show all of the work used to solve this problem.

2 H2O (l)---> 2 H2 (g) + O2 (g)

Answer 1

what you should know.
PV=nRT

find n. g H2O to mol O2

28.7 g H2O x(mol/18.02 g) x(mol O2/2 mol H2O)=ANS

rearrange formula and solve for V.
V=nRT/P

V=(ANS x.0821x294)/.986=ANS

so using a calculator, solve for ANS

Answer 2

oo.. ok. thankyou...