【单选题】Debate over the Use of Renewable Energy Amusable of Rockefeller University in New York, US says the key renewable (可再生的) energy sources, including sun, wind and bibfuls, would all require vast amounts...
【简答题】A、B两种固体物质的溶解度曲线如图所示.请回答: (1)______℃时,A、B两种物质的溶解度相同; (2)我国有些地区有一种说法:“冬天捞碱,夏天晒盐”.这里的碱是指Na 2 CO 3 ,盐是指NaCl.那么,图中______(填A或B)的溶解度曲线与Na 2 CO 3 的溶解度曲线相似. (3)人们用上述方法从盐湖中捞得的Na 2 CO 3 (常含有少量的NaCl).试计算Na 2 CO 3...