1. Aluminum and iron (III) oxide react to produce iron, along with extreme heat:2Al + Fe2O3 --> Al2O3 + 2Fe 45 kg of aluminum is reacted with excess iron (III) oxide to produce 51 kg of iron. Calculate the percent yield for this reaction.

yes it is balanced

answer seismograph;

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.