What amount of substance and what volume of hydrogen can be obtained by decomposition of 0.5 mol

What amount of substance and what volume of hydrogen can be obtained by decomposition of 0.5 mol of water into simple substances?

1. Let us write the equation of the reaction of decomposition into hydrogen and oxygen:

2H2O = 2H2 + O2;

2.According to the reaction equation, the amount of water is equal to the amount of hydrogen:

n (H2) = n (H2O) = 0.5 mol;

3.Calculate the volume of released hydrogen:

V (H2) = n (H2) * Vm = 0.5 * 22.4 = 11.2 liters.

Answer: 0.5 mol, 11.2 liters.