CrazyChemist
Well-known member
^^^^^^......I'm looking for your answer CrazyChemist...?
My apologies sir. Bogged down with pre-holiday paperwork.
So to answer the question.....
40mg requires exactly 0.67mL according to our calculations, right? (Actually it requires 0.6666666666....., i.e. 2/3 of one mL) Let's see what happens if we round to 0.6 and to 0.7.
(1800mg/30mL)*0.6mL = 36mg
(1800mg/30mL)*0.7mL = 42mg
So by rounding you get +/- 0.5mg about, which is perfectly within the margin of error. Consider how differently everyones body chemistry is, how differently each solution may have been prepared, etc. With all those variables up in the air there is no reason to be concerned about being more accurate with the measurement than that. I therefore recommend rounding to the nearest 0.1 (e.g. 0.7 for the calculation above)