parts a, b, and c

How many molecules are there in a 3.11-g sample of HCl ? HCl molecules Hematite. Fe C2, is an important are of iron. (An ore is a natural substance from which the metal can be profitably obtained.) The free metal is obtained by reacting nematite with carbon monoxide, CO, in a blast fumace. Carbon monoxide is formed in the furnace by partial combustion of carbon. The reaction is Fe2O3(s)+3CO(g)=2Fe(s)+3CO2(g) How many grams of iron can be produced from 1.03kgFe2O3 ? 9Fe Calculate the mass, in grams, of KNO2 required to prepare exactly 500mL of a 0.190M2 solution of KNO. 9