To convert milligrams to the milliequivalent (mEq) of any substance requires a few different things. Milligrams is a measurement of weight and mEq is equal to one-thousandth of a chemical equivalent. It is used to find the combining power of a chemical electrolyte in fluid. To solve the conversion, you will need the weight in milligrams, the atomic weight of the atom and the atom's valence. The atomic weight of Chromium (Cr) is 51.9961 with a valence of 2.
Instructions
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Find the weight of the element in milligrams. For example, you may have 40 milligrams of chromium you are converting to mEq.
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Fill in the equation to find mEq. Thus, mEq = milligrams divided by atomic weight times valence or "mEq = 40 / 51.9961 * 2."
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Enter the equation into a calculator. In the example, 40 milligrams of chromium equals 1.538576932 mEq.