Why did the Google molecular weight of methane come out as 20.067?
Hello, I was working on atmospheric composition and asked google methane pubchem molecular weight It came up with 20.067 which traces to https://pubchem.ncbi.nlm.nih.gov/compound/2H4_Methane Now I am tired, but carbon is 12.011 and hydrogen is 1.008*4, so the total should be closer to 16.011 Is this page supposed to be deuterated? 12.011 + 2*4.0282035557 = 20.067407
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