What is ΔG°rxn for the combustion of propane? C3H8(g) + 5O2(g) → 3CO2(g) + 4H2O(g) Substance: C3H8(g) O2(g) CO2(g) H2O(g) ΔG°f (kJ/mol): –24.5 0 –394.4 –228.6

they are made of gases.

they have a spherical shape.

they make energy through fusion.

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!

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~ trueboss72

answer seismograph;