The decomposition of hydrogen peroxide is a useful way to obtain oxygen. It is a first order reaction with a rate constant of 0.0410 min-1. 2 H2O2 (l) → 2 H2O (l) + O2 (g) If we start with a 3.00% hydrogen peroxide solution, what will its concentration be after 30.0 min?

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.

50.23 i believe is correct but don't quote me on that.