Question

HELP PLEASE !!!!

What are the oxidation numbers of the atoms in this reaction? Check all that apply. CH4(g) + 2O2(g) → CO2(g) + 2H2O(g)
-4 for C in CH4
+4 for C in CO2
-2 for O in all substances
+1 for H in both CH4 and H2O
+4 for O in H2O

Answer 1

It’s the first, second, and fourth options. Hope it helps ^^

Answer 2

Answers are:
-4 for C in CH4, because carbon has greater electronegativity than hydrogen and he attracts shared electrons.
+4 for C in CO2, because carbon has smaller electronegativity than oxygen.
+1 for H in both CH4 and H2O, because hydrogen has amaller electronegativity than both carbon and oxygen.