I am not sure I understand your question, but let me throw some ideas out there.
MMS is actually NaClO2 in solution. The solution is usually measured in ml or ounces and not grams.
If you want to make one bottle of Miracle-Mineral-Supplement (about 4 ounces) and have sodium chlorite powder you would put 33.6 grams of the sodium chlorite powder into a measuring device, then add enough water to make a total of 120 ml.