The density of potassium is 0.862g cm-3 at room temperature, with atomic weight of 39.1g/mol. use only these two parameters together with avogadro’s number calculate: a) how many atoms are there in one cubic centimeter of solid potassium at room temperature? b) potassium has body-centered cubic (bcc) crystal structures. use this fact, together with your answer from part (a) determine the lattice parameter