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27-10-2017
Chemistry

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Hydrogen peroxide is sold as a 3.0% (by mass) solution. The rest of the solution is water . How many grams of hydrogen peroxide are in 250 grams of this solution?

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27-10-2017

___3% H2O2 (mass/vol)

a) mass bought = 3g/100ml * 250 ml = ?? g H2O2

b) moles / 0.250 liter = (?? g H2O2 / MW H2O2 g/mole) / 0.250 liter = ??M

Plug and SOLVE

Basic mathematics is a prerequisite to chemistry – I just try to help you with the methodology of solving the problem.

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