A variation of this quantity is ideally maximized and minimized for “plug flow” and “continuous flow stirred tank” reactor configurations. Along with turnover frequency, reactor performance is often measured using the “space-time” form of this quantity. Exothermic reactors operate at a temperature that balances the tradeoff between rate and this quantity. For batch reactors, this quantity equals the product of conversion and selectivity. Green chemists use a variation (10[1])of this quantity that accounts for byproducts called “atom economy.” (10[1])In organic chemistry labs, failing to vaporize any remaining solvent can make measurements of this quantity exceed 100 percent. For 10 points, (10[1])name this quantity (10[1])that describes how much of a reactant was converted into product. ■END■