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It is customary to indicate the strength of a sample of H_2O_2under specification of volume. The strength of H_2O_2solution can also be in %(w/v) or molarity or normality. 10 vol H_2O_2 solution means Iml of H_2O_2solution decomposes to give 10ml of O_2gas at STP. 1 lit of H_2O_2solution decomposes to give 10 lit of O_2gas at STP.The volume of 20V-H_2O_2solution, required to prepare 5 litres of oxygen at S.T.P is |
| Answer» Solution :`X xx20 = 5000, x = 250 ml` | |