chemistry

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How do i calculate the concentration of H2O2 after 150 mL of distilled water is added to 30 mL of 1.0 M of H2O2?

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    You can use c1v1 = c2v2
    c = concn
    v = volume
    I prefer just a simple ratio of
    1.0M x (30/180) = ? and that assumes the solutions are additive.

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