Conversion Circle

I might have finally found my calling...

Anyway, yar be my second transmutation circle, the original idea being based on the transmutation circles from FullMetal Alchemist, thus its Fanart category. However, unlike the first (which I have declared a general amplifier and to hell with anyone's questions on it), this one actually has a definite purpose.

What separates this circle from any else is that, while a normal circle uses only the elements present in the original artifact, this one is used to convert purified compounds (i.e. sodium chloride) or elements into other compounds or elements.
Procedure:
1) Draw out the circle. Duh.
2) Obtain a sample of the target substance, and place it in the Product subcircle (far upper one, the yin/yang). The sample gives the circle its intended product.
3) Place the reactant inside the lower Origin circle (looks vaguely like Yuna's staff from Final Fantasy X, or an up arrow).
4) Activate the circle, and let the transmutation process.

Formula for determining the end product mass:
([Mass of original sample]*[Molecular weight of original sample])/[Molecular weight of Product)=Mass of Product

NOTES AND KNOWN LIMITATIONS:
1) Do not, not, not, for the love of Asimov, NOT use this circle with radioactives. It will decay during the transmutation and screw over your results!
2) This circle will not work with gases. Get over it.
3) It also will not work with gold in either direction of reaction. That's another day, and another circle.
4) If you use this circle with liquids, it would be a very wise idea to dig a pit under the appropriate subcircle to hold the liquid. Using a liquid in a container will prevent the reacting.
5) If your substances react in the Earth's atmosphere readily, invest in a pressurizable chamber to perform the transmutation in, and fill it with a gas that won't react easily. (And for the love of Asimov, bring in an air supply and any necessary protection.)
6) The two subcircles used to hold the samples form the figure-8 in the center. Hope that clarifies someone's questions.