I need help figuring out if some of these are reactants or chemicals.

Answer:
Reactants - methane (CH4) and oxygen (02)
Products - carbon dioxide (CO2) and water (H20)
Explanation:
If we wrote out the equation, it would look like:
methane + oxygen ⇒ carbon dioxide + water
(Reactants on the left and products on the right)
Tip: This type reaction is called combustion (burning a fuel in the presence of oxygen)
carbon dioxide (CO2) AND WATER (H2O) ARE
PRODUCT
WHERE AS METHANE (CH4) AND OXYGEN (O2) ARE REACTANT