# Chemistry! I need help quick! Thank you very much!

2h2O2 + 2H2O ---> 2H2O + O2
If 50cmcube , 2.0 mole/dmcube of hydrogen peroxide is decomposed and volume of oxygen gas collected. How much hydrogen peroxide is decomposed?

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1. Huh? it was given.

moles hydrogen peroxide=2.0mol/dm^3 * 50ml * (1dm^3/1000ml)

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