a. What is the theoretical yield of CO₂ if 1.00×10³kg (1 metric ton) of CaO is obtained by thermal decomposition of CaCO₃?

b. In ordinary Portland cement, the average CaO content of the clinker (the inorganic part of the dried cement prior to adding gypsum and any additives or fillers) is 63.5%. What quantity of CO₂ is emitted to produce 1.00×10³ kg of clinker?

c. If the clinker makes up 95% of the mass of the cement, a good estimate for most cement produced in the twentieth century, what quantity of CO₂ is emitted in the production of 1.00×10³ kg of cement?

d. In some parts of the world waste products, blast furnace slag from the manufacture of steel, or fly ash from coal-fired power plants are added to cement to reduce the amount of clinker in the cement. If the clinker makes up only 60% of the cement by mass, what quantity of CO₂ is emitted in the production of 1.00×10³ kg of cement?