1. Molten iron and carbon monoxide are produced in a blast furnace by the re-
action of iron(III) oxide and coke (carbon). If 25.0 kg of pure Fe2O3 are used,
how many moles of iron can be produced?

ca has a crystalline lattice with positive ions (since it is a metal, metals are positively charged) and electrons flow freely in its structure since the ca atoms have a large nuclear radius so the electrons are not tightly held, therefore the electrons can flow freely since they are not being highly attracted by the nucleus. moreover, one of the properties of metals are that they are conductors of electricity, thus proving ca is the element.