The decomposition of water produces 50g of Hydrogen gas and 75 g of oxygen gas. How much water decomposed?
Chemistry · Middle School · Tue Nov 03 2020
Answered on
Formula :
Number of moles = mass/Molar mass
Mass of O2 = 75 g
Molar mass of O2 = 32
Number of O2 moles = 75/32
= 2.34 moles
Mass of H2 = 50g
Molar mass of H2 = 2
So, Number of moles = 50/2
= 25 moles
2 moles of H2O produce 1 mole of O2 and M moles of H2O produce 2.33 moles of O2
M = 2 × 2.34/1
= 4.68 moles
Mass of H2O = Number of moles × molar mass
= 4.68 × 18
= 84.24 g
Hence, water decomposed is equal to 84.24 g.