4al+3o2–> 2al2o3 how many liters of o2 gas, measured at 786 mmhg and 26 degrees celsius, are required to completely react with 2.8 mol of al

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.

its first and third is your answer i did the qustion the fourth isnt right