Description acceptable. This quantity is measured in high throughput using an apparatus called the “Stromboli oven” and reagents called CombiTitrants. This quantity is measured by flowing a gas over a spiral-wound platinum electrode coated in phosphorus pentoxide. Cracked crude oil passes through molecular sieve 3A until this quantity is low enough for gasoline. If this measurement is large enough, pellets of calcium sulfate that are impregnated with cobalt chloride turn from (*) blue to pink. The amount of in situ-generated iodine that reacts with excess sulfur dioxide is stoichiometric to this quantity (-5[1])in a coulometric Karl Fischer titration. (10[1])A lyophilizer (10[1])reduces (10[1])this quantity (10[1])to zero (10[1])to improve the shelf (-5[1])life of drugs (10[1])and food. For 10 points, (10[1])what variable is kept low using silica gel packs (10[1])or other (10[1])desiccants? (10[1]) (10[1])■END■