Chemical Engineering - Stoichiometry - Discussion

The decomposition of water takes place in the following way -

H2O ⟶H2 + O2.

We find that the ratio of the mass of hydrogen to that of oxygen in water is 1:8, so when water decomposes it leads to the production of hydrogen and oxygen in 1:8 proportion.

So, this means that the decomposition of 90 kg of water produces 10 kg of hydrogen and 80 kg of oxygen and the total mass before and after decomposition is 90 kg.

This follows the law of constant proportions.

Thus 80 kg of oxygen can be produced by 90 kg of water.

2H2 + O2 = 2H2O.

So, we can say that 1 mole of O2 gives 2 moles of H2O.

Now from the formula,
Mass = M.W. × Moles
We can get 90 kg [90000 gm] of H2O containing 5000 no. of moles.

Now, 2 moles H2O = 1 mole O2.
5000 moles H2O= ?
So, we get 2500 moles of O2.

Now by converting moles into mass we get 80000 gm or 80 kg of O2.

H2+2O2 = 2H20.

90 grams of water = 5 moles of water (moles=weight/molecular weight)

That means 2 moles of O2 = 2 moles of H2o,
?moles of O2 = 5 moles of H2O,
5x2÷2 = 5 moles.
Convert moles of O2 to the weight of O2 get 80 gms.

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

2+1/2 * 32=18.

Now taking
H2O:O2,
18:16,
1:16/18,
90:16/18 * 90,
= 80.

(16/18) * 90 = 80.

I am not getting it, please explain the answer.

H2+1/2O2=H2O.
2+32/2=18.

18H2O=08O2,
So,
90H2O=16/18*90. O2.
O2= 16*5 =80 kg O2.

Please explain the answer clearly.

Please explain the answer.

Please explain the answer.