【单选题】More than 50 corticosteroid hormones are produced in the adrenal cortex by reactions that remove the side chain from the D ring of cholesterol and introduce oxygen to form keto and hydroxyl groups. Ma...
【简答题】Potassium chromate, a bright yellow solid, is produced by the reaction of solid chromite ore (FeCr 2 O 4 ) with solid potassium carbonate and gaseous oxygen at high temperature. The other products of ...
【简答题】What is the empirical formula of the following compounds? a. a liquid containing 2.0g of hydrogen, 32.1g sulfur and .0g oxygen. b. a white solid containing 4.0g calcium,3.2g oxygen,0.2g hydrogen. c....