The products formed when methane is burnt in sufficient oxygen are carbon dioxide and water.

Explanation:
When methane (CH4) is burnt in sufficient oxygen (O2), a combustion reaction takes place. This is an exothermic reaction, meaning it releases energy in the form of heat and light. The reaction can be represented by the following equation:

CH4 + 2O2 → CO2 + 2H2O

Here's a detailed explanation of each product formed:

1. Carbon Dioxide (CO2):
- In the reaction, one molecule of methane reacts with two molecules of oxygen to produce one molecule of carbon dioxide.
- The carbon atom in methane is oxidized, meaning it gains oxygen atoms from the oxygen molecules. This results in the formation of carbon dioxide.
- The chemical formula of carbon dioxide is CO2, where one carbon atom is bonded to two oxygen atoms.

2. Water (H2O):
- In the reaction, one molecule of methane reacts with two molecules of oxygen to produce two molecules of water.
- The hydrogen atoms in methane react with the oxygen atoms from the oxygen molecules to form water.
- The chemical formula of water is H2O, where two hydrogen atoms are bonded to one oxygen atom.

Overall Reaction:
- The combustion of methane in sufficient oxygen results in the formation of carbon dioxide and water.
- This reaction is commonly known as complete combustion because all the carbon in methane is converted to carbon dioxide, and all the hydrogen in methane is converted to water.

Importance:
- Methane is a greenhouse gas and a major contributor to global warming.
- The combustion of methane in the presence of sufficient oxygen helps to reduce its impact as a greenhouse gas.
- The products of this reaction, carbon dioxide and water, are less potent greenhouse gases compared to methane.
- However, carbon dioxide is still a greenhouse gas and contributes to climate change, albeit to a lesser extent than methane.

When methane burns in oxygen then product formed is CO2 and Oxygen....