题目内容
A.50% B.75% C.92.7% D.100%
A.50% B.75% C.92.5% D.100%
纯净的碳酸氢钙试样在高温下分解,当剩余的固体物质质量为原试样质量一半时,碳酸氢钙的分解率是( )
A.50% B.75% C.92.7% D.100%