answer the 4 items

21. The analysis of the limestone is as follows: CaCO392.89% weight; MgCO3 5.41% weight and insolubles 1.70% weight. 100 tons of limestone are extracted from a mine, they are subjected to grinding where 2% of the raw material is lost. The ground material is subjected to a wash with 150 liters of sulfuric acid ( H2SO4, density 1.83g/ml ) to remove all insoluble matter. The already clean material is introduced into an oven where the following reactions take place: 1. CaCO3CaO+CO2(85% efficient reaction) 2. MgCO3MgO+CO2(95% efficient reaction) Within the same furnace, carbon dioxide and other materials are separated, the resulting mixture ( CaO and MgO ) forms what is known as Lime. a) How many tons of lime can be produced in the process? 22. b) How many tons of CO2 are released into the environment? 23. c) What is the composition of MgO in