Construct an energy graph for C3H8(g) + 5O2 (g) -> 3CO2(g) + 4H20(I)

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

if you need further assistance, let me know: )

~ trueboss72

a chemical change results in a new substance being formed; whereas a physical change will result in a different state of matter

explanation: