工业上,煅烧石灰石【CaCO3】可以制得生石灰【CaO】和二氧化碳。如果要制取5.6t氧化钙,需要含碳酸钙80%的石灰石质量是多少?(写出详细的解题过程) 答案:解:设需要CaCO3的质量为X… ……1分 CaCO3 CaO+CO2↑ ……1分 100 56 X 5.6t= 100 X 56 5.6t ……1分 X=100t ……1分 石灰石的质量=100t÷80%=125t…1分 答:需要石灰石125t—The rich man his money before he died. —Yes.I think he wanted to make himself feel better. A.put up B.gave away C.took away D.picked up