Conservation of Matter ...Scientists have done many experiments to test whether mass changes during
chemical changes or physical changes. Their data support, or back up, the idea
that mass stays the
I
before and after any change- no matter what. From this evidence, scientists
developed the
The law states that in any chemical change, the total mass of the matter does
not change...
Ewww

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.

c. orbital shape i hope this is correct