Question

An ordered list of chemical substances is shown. Chemical Substances

1 )CH4
2 )O2
3 )CO2
4 )NO2
5 )Fe
6 )H2O
If substance 1 is a reactant in a combustion reaction, then what substances could be part of the products?
a) 2, 3
b) 3, 6
c) 4, 5
d) 2, 5

Answer 1

The correct answer is a) 2, 3, because when CH4 is a reactant in a combustion reaction, the products are CO2 and H2O, which correspond to O2 as another reactant and CO2 plus H2O as products.

Step-by-step explanation:

If CH4 (methane) is a reactant in a combustion reaction, the chemical substances that could be part of the products are carbon dioxide (CO2) and water (H2O). This is due to the fact that the combustion of methane involves it reacting with oxygen (O2) to form CO2 and H2O as products. Here's the balanced chemical equation representing this reaction:

CH4 + 2O2 → CO2 + 2H2O

Therefore, the correct answer to the question is a) 2, 3, which refers to O2 as being part of the reactants and CO2 and H2O as being part of the products of the combustion reaction.