Question

How many grams of oxygen gas will be produced in the electrolysis of water, for every gram of hydrogen gas formed? Reaction: 2H2O(l) → 2H2(g) + O2(g)

Answer 1

reaction is

2H₂O_(l) ? 2H_2(g) + O_2(g)

According to reaction 1 mole of O₂ produced when 2 mole of H₂  production.

molar mass of H₂ = 2.01 g/mol that mean 1 mole of H₂ = 2.01 gm then 2 mole of H₂ = 4.02 gm

molar mass of O₂ = 32 g/mol that mean 1 mole of O₂ = 32 gm            

that mean when 4.02 gm of H₂ produced 32 gm of O₂ produced then when 1 gm of H₂ produced how many gm of O₂ produced calculation are as given below

4.02/1 = 32/?

? = 132/4.02 = 7.96

7.96 grams of oxygen gas will be produced in the electrolysis of water, for every gram of hydrogen gas formed.