(a) The equation CH4 + 02 -> CO2 + 2H20 corresponds to a combustion and an oxidation-reduction reaction.______ (b) A sub

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(a) The equation CH4 + 02 -> CO2 + 2H20 corresponds to a combustion and an oxidation-reduction reaction.______
(b) A substance can gain electrons without another substance donating electrons._____
(c) In charge balance, 5 Fe2+ it is equivalent to having 10 positive charges._____
(d) In an acid reduction-oxidation equation, H+ is used to balance the oxygens._____
(e) In the following half reaction: NO2- --> NO3-, the atom that changes its oxidation number is nitrogen.____