A scientist reacts 9.761 x 1023 molecules of so, with 15.4 grams of O2 until all of the O2 is gone. He collects 58.9 g of SO3. Calculate the % yield of SO3 and the % of SO2 left
over at the end of the reaction.

answer; talc and gypsum;

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.