Molecular weight: a simple example

• Molecular weight

  • Molecular formula
    • ?(count(atom(i))*atomic_weight(atom(i)))

• Accuracy depends on accuracy of atomic weights ( IUPAC)

  • C13H22N4O3S
    • 314.45 (average molecular weight )
    • 314.141235 ( accurate mass of commonest isotope)

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