The decomposition of hydrogen peroxide in dilute sodium hydroxide at 20 C

H₂O₂(aq) H₂O(l) + O₂(g)

is first order in H₂O₂ with a rate constant of 1.1010^-3 min^-1.

If the initial concentration of H₂O₂ is 6.4810^-2 M, the concentration of H₂O₂ will be M after 1235 min have passed.

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