If you are dealing wiyh the decomposition of hydrogen peroxide , the equation is :
2H2O2 → 2H2O + O2
2 mol hydrogen peroxide decomposes to produce 2 mol H2O and 1 mol O2
no hydrogen gas is produced .
The only data that I can interpret is that “ 32.0 g gas is produced” I have interpreted this to mean that 32.0 g oxygen O2 gas are produced. This is exactly 1 mol O2 .
So you can say :
When 2 mol hydrogen peroxide decompose 2 mol water and 1 mol O2 gas are produced
And if you want this as a mass:
Molar mass H2O2 = 34 g/mol
Molar mass H2O = 18 g/mol
Molar mass O2 = 32 g/mol
In mass units
When 68 g H2O2 decompose , 36 g H2O and 32 g O2 are produced.
