C2H4 + 3 O2 --> 2 CO2 + 2 H2O If you start with 32.0 grams of O2 how many
moles of H2O can be formed?

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.

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explanation:

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