    Sentence 1:8 A. stoichiometry of 1.03 is  typical’ when» the - FGD~ process is  producing gypsum: by-product, while a  stoichiometry of 1.05: is. needed to  produce waste suitable for.a landfill.    Sentence 2: A stoichiometry of 1,03. is.  typical. when’ the FGD . process is  producing gypsum by-product