User guide

Molecular weight
Displays the average molecular mass of the structure, where atomic masses are based on the weighted average of all
isotope masses for the element.
Units
atomic mass units
Functions
CHEM_MOLWEIGHT(cell ref)
CHEMPROPSTD_MOL_WEIGHT(cell ref)
CHEMPROPSTD_MASS(cell ref)
Examples
In cell: =CHEM_MOLWEIGHT(A2)
Result: 174.23896
In cell: =CHEMPROPSTD_MOL_WEIGHT(A2)
Result: 174.238960
In cell: =CHEMPROPSTD_MASS(A2)
Result: 174.238960
Exact mass
Displays the exact molecular mass of the molecule, where atomic masses of each atom are based on the most com-
mon isotope for the element.
Units
g/mole
Function
CHEMPROPSTD_EXACT_MASS(cell ref)
Example
In cell: =CHEMPROPSTD_EXACT_MASS(A2)
Result: 174.104465
Number of atoms
When this function is called with just a cell reference, it displays the total number of atoms in the structure. When this
function is called with a cell reference and an atomic symbol, it displays the number of atoms of the given element in
the structure.
Functions
CHEM_NUM_ATOMS(cell ref)
CHEM_NUM_ATOMS(cell ref, atomic symbol)
ChemBioDraw 13.0
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