In the reaction c5h8 + __o2 → 8h2o + 5co2, what coefficient should be placed in front of o2 to balance the reaction? 5 8 9 no coefficient is needed

it is actually nine

atomic mass = 39

number of neutrons = 20

number of protons= 19

electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1

the number of electron in first shell = 2

number of electrons in n=3 shell = 8

level 4 to level 2 : ))