Calculate the volume of hydrogen that is released during the decomposition of 5.4 grams of water.

Hydrogen is produced by the decomposition of water using an electric current.
Given:
m (H2O) = 5.4 g
v (H2) = x l
Decision.
One mole of any gas takes up a volume of 22.4 liters.
1) Let’s write the equation for the reaction of water decomposition:
2H2O = 2H2 + O2
M (H2O) = 2 * 1 + 16 = 18 g / mol, according to the reaction equation, 2 mol of water participates in it,
m (H2O) = 2 * 18 = 36g
V (H2) = 2 * 22.4 = 44.8L
2) According to the equation, 44.8 liters of hydrogen are formed from 36g of water, then from 5.4g – xl
3) make up the proportion: 5.4 / 36 = x / 44.8. Hence x = 5.4 * 44.8 / 36 = 6.72L
Answer: 6.72L