Question

The disinfectant hydrogen peroxide (H2O2) decomposes to form water and oxygen gas. How much O2 will result from the decomposi- tion of 7.24 mol of hydrogen peroxide? Answer in units of mol.

Answer 1

Answer:

3.62 moles

Explanation:

The decomposition reaction of hydrogen peroxide is shown below as:

$2H_2O_2_{(aq)}\rightarrow 2H_2O_{(l)}+O_2_{(g)}$

Given that :

Moles of hydrogen peroxide = 7.24 moles

From the reaction,  

2 moles of hydrogen peroxide on reaction forms 1 mole of oxygen gas

Also,

1 mole of hydrogen peroxide on reaction forms 1/2 mole of oxygen gas

So,

7.24 moles of hydrogen peroxide on reaction forms $\frac {1}{2}\times 7.24$ mole of oxygen gas

Moles of oxygen gas formed = 3.62 moles