How many liters of carbon dioxide (CO2) at STP are needed to produce 5.00 liters of oxygen gas? (1 kg = 2.20 lbs.)

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.