How many moles of Fe3O4 are required to supply enough iron to prepare 0.472mol Fe2O3 ?

Which best describes why nh4+ can form an ionic bond with cl-?

The boiling point of liquids is very high what does it indicate

The characteristic of two different types of reactions are shown below. reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.