4. (J1-2010S-22) A compound contains only carbon, hydrogen, oxygen. Analysis gives H= 9.43%, C=45.28%.(a) Find the empirical formula of the compound. (b) If
the molar mass of the compound is -318 g/mole, what is the molecular formula?

i think its 100

i hope this !

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.