Question

Calculate % by mass of a h2o2 solution which is 45.4 volume

Answer 1

The percentage by mass of H2O2 solution which is 45.4 V is equal to 13.78%.

• V volumes of H2O2 means that one litre of the given H2O2 solution produce V litres of oxygen gas at STP.
• Using the above meaning, we get molarity= V/11.2 = 45.4/11.2 M.
• So, one litre of the solution contains 45.4/11.2 moles of H2O2 . Hence, one litre of the solution will contain 45.4*34/11.2 g of H2O2.
• Total mass of 1 litre of the solution is 1000 g.
• Therfore, percentage mass = (45.4*34/11.2)*100/1000 = 13.78%

Answer 2

Answer:

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