Question

0.5 mol of Cl2 find the mass

Answer 1

 well 1 mole of stuff is 6.022*10^23, so 1/2 mol = 3.011 * 10^23. Since Cl2 is comprised of two CL atoms you will have 2 * 3.011*10^23 = 6.022 * 10 ^ 23