One of the components contained in gasoline is octane (C,H18). Which statement best describes CgH18?

Question

A. It is a mixture containing a combination of the properties of hydrogen and carbon.
B. It is a pure substance containing a combination of the properties of hydrogen and carbon.
C. It is a mixture containing properties different from those of hydrogen and carbon.
D. It is a pure substance containing properties different from those of hydrogen and carbon.

Answer 1

The correct answer is:

B. It is a pure substance containing a combination of the properties of hydrogen and carbon.

Octane (C8H18) is a pure chemical compound, meaning it consists of only octane molecules and has a defined chemical structure. The properties of octane are distinct from those of the individual elements (hydrogen and carbon), but it is still a combination of those elements in a specific ratio.