Which of the following statements are true? Select all that apply. There are 6.02 x 10^23 sodium ions in one mole of sodium ions.
There are 6.02 x 10^23 atoms of carbon in one mole of carbon.
There are 6.02 x 10^23 protons in one mole of protons.
There are 6.02 x 10^23 molecules of ammonia in one mole of ammonia

it’s previous models   because when i picked that son of a gun’s answer it was wrong look for previous models because they might make it a different letter  

substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.