9. Which of the following statements are true? Select all that apply.
There are 6.02 x 1023 molecules of ammonia in one mole of ammonia.
There are 6.02 x 1023 atoms of carbon in one mole of carbon.
There are 6.02 x 1023 sodium ions in one mole of sodium ions.
There are 6.02 x 1023 protons in one mole of protons.