Information about the yield percentage of methamphetamine from ephedrine and pseudoephedrine

a mole represents a fixed number just like a dozen or a kilo, but a mole is a huge number used to measure the mass or
weight of a fixed number of atoms or molecules. one mole is 6.02 x 10 to the 23rd power, or 602 with twenty one more
zeros after it. one mole is a 24 digit number. one pseudoephedrine molecule has 10 carbon, 15 hydrogen, 1 nitrogen
and 1 oxygen atoms in it. (c10,h15,n1,o1) one mole of pseudoephedrine has 10 moles of carbon (120g),15 moles of
hydrogen (15g), 1 mole of nitrogen (14g), and 1 mole of oxygen (16g) which added together equal 165 grams. one
molecule of methamphetamine is c10,h15,n1. one mole of methamphetamine is identical to one mole of pseudoephedrine
minus the 1 mole of oxygen (16g), so one mole of meth is 149 grams. 149 is 90% of 165 grams.

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