A mole of CCl4 contains a mole of Cl atoms

Answer 1

1 mole of anything contains 6.022 x 10²³ items in it. So, a mole of puppies has 6.022 x 10²³ puppies and a mole of CCl₄ has 6.022 x 10²³ molecules of CCl₄ in it. But each molecule of CCl₄ has 4 atoms of Cl, so that makes 4 times 6.022 x 10²³ atoms which is 24.088 x 10²³ = 2.4088 x 10²⁴ atoms of Cl.