water
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It takes one molecule of carbon dioxide to make one molecule of carbon dioxide.
But-
Carbon dioxide has one carbon (C) and two oxygens (O2). Methane has one carbon (C) and four hyrdogen (H4). So they are not the same.
Carbon dioxide is a covalent molecule.
Carbon dioxide
Carbon dioxide, methane are the two more common compounds.
When an organic molecule such as methane or ethanol undergoes complete combustion (in the presence of oxygen) it produces Carbon dioxide and water.
Methane is practically the same as natural gas. When 1 molecule of methane (CH4) is burnt in oxygen it produces 1 molecule of carbon dioxide (CO2) and two molecules of water (H2O). If the methane is NOT burnt it causes twenty times more damage as a greenhouse gas than carbon dioxide. (So keep lighting those farts!)
The molecular formula is CH4. This molecule is know as Carbon tetrahydride or more simply Methane.
Methane blocks heat radiation twenty times more effectively per molecule than does carbon dioxide. Fortunately, atmospheric methane concentrations are very much lower than carbon dioxide.
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Burning methane produces carbon dioxide and water vapor, but not nitrogen. This is because methane is composed of carbon and hydrogen, whose oxides are carbon dioxide and water respectively.
Methane (CH4) is composed of one atom of carbon and four atoms of hydrogen, a total of five.
Water, oxygen, carbon dioxide, sodium chloride, ammonia, carbon monoxide, calcium phosphate etc
methane and oxygen react together (combustion) to give carbon dioxide + water. The reactants are methane and oxygen which react to form the products water and carbon dioxide.
There have been learned people who have asserted this is not possible. There have been others who assert that it is. I am one of the later. Please consider this: Suppose you build a generating plant that burns methane gas leaking from a landfill to produce electricity. It burns methane against atmospheric oxygen to produce carbon dioxide and water. For each molecule of methane used, there is one molecule of carbon dioxide produced. Each molecule of methane is 37 times as powerful as carbon dioxide as a global warming gas. Therefore, the burning of methane that would otherwise be released reduces global warming, giving the process a negative carbon footprint. In fairness, I should point out that for each molecule of methane, there will be two atoms of water, in addition to the carbon dioxide, in the output. Water vapor is also a greenhouse gas. But the water produced would can be condensed immediately without any environmental effect, so I am not considering it in the calculation.