The production of iron and carbon dioxide from Iron(III) oxide and carbon monoxide is an exothermic reaction. How many kilojoules of heat are produced when 3.4 mol Fe2O3 reacts with excess CO? Fe2O3(s) + 3 CO(g) 2 Fe(s) + 3 CO2(g) + 26.3 kJ

Answer    "a salt" would be the best answerexplanationsalts can be defined as ionic compounds that are neither acids nor bases. nacl is an example of a salt, and its ionic.an enzyme is an organic compound which is covalently bonded, not ionically bonded.acids are generally held together by covalent bondsan element does not need any bonds to exist

The answer you are looking for is option d

Ithink about 50 % of an original isotope's number of atoms remain