Is there a table of common conversion factors for converting chemical forms?
Chemical form conversion factors.
There is a section in the water analysis handbook (WAH) that includes such a table. This section of the WAH is available on the website: Water Analysis Guide (includes an application guide, abbreviations and conversions, lab practices, chemical analysis, sample pretreatment by digestion, bacteria analysis, and waste management/safety). The conversions section starts on page 12 of the .pdf, which has page number 10 in the bottom left corner.