Question

Consider the reaction below.

2H2O  2H2 + O2

How many moles of hydrogen are produced when 6.28 mol of oxygen form?

Answer 1

2H2O ---> 2H2 + O2
...................2 mol...1 mol

2 mol H2 ---- 1 mol O2
X mol H2 ---- 6.28 mol O2
X = (6.28×2)/1 = 12.56 mol H2