What is the volume of “20 volume H₂O₂” required to get 5000 cm3 of oxygen at STP ?

20 volume 2 2 H O means one litre (1000 cm3) of hydrogen peroxide on decomposition gives twenty litres (20 L = 20000 cm3) of oxygen at normal temperature conditions (NTP). Given, The volume of oxygen = 5000 cm3 Let the volume of hydrogen peroxide = x cm3 Solving for x, we get x = 3 5000 1000 50,00,000 250 20,000 20,000 cm x The volume of “20 volume 2 2 H O ” required to get 5000 3 cm of oxygen at STP is 250 3 cm .