The green substances on a copper square, penny, and the statue of Liberty are not the same thing. Although they are all green, and they are all soluble in water, they have different melting points, densities, and solubility in alcohol. Substances have properties. These have different properties, so they have to be different Substances. How could the explanation be improved?

i don,t know so just answer mine

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.

the answer your looking for is c).