Q3. Assign the oxidation numbers of carbon and oxygen in the reaction given below. and identify as which of the 2 elements (carbon or oxygen) is oxidized, and which one
is reduced? Show your calculations
CH4 (g) + 202 (g) —> C02(g) + 2H20(l)

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.

distance, luminosity, brightness, radius, chemical composition, and temperature

put the answers   and i could answer.

the answer would be b i believe