the molar mass of mgi2 isselect one:a.the sum of the masses of 1 atom of mg and 2 atoms of i.b.the sum of the masses of 1 mol of mg and 1 mol of i.c.the sum of the masses of 1 atom of mg and 1 atom of i.d.the sum of the masses of 1 mol of mg and 2 mol of i.