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windows default iconMolecular Formulas Publisher's description

If we know the molecular weight

If we know the molecular weight of a substance we implicitely know the atomic composition of that substance - provided that the molecular weight is known to an accuracy which is sufficient to distinguish between molecules having the same nominal mass.

To explain this, let's have a look at a very simple example: suppose we know that our substance has a molecular weight of 28. A quick calculation (considering only the nominal masses of the most abundant isotopes of carbon, hydrogen, oxygen, and nitrogen - 12, 1, 16, and 14, respectively) shows that there are three substances which all have the same molecular mass of 28: C2H4 (ethene), CO (carbon monoxide) and N2 (nitrogen gas).

System Requirements:

No special requirements.
Program Release Status: New Release
Program Install Support: Install and Uninstall

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