All the structures shown here have the molecular formula C8H18. Which structures are the same molecule? (Hint: One way to answer this question is to determine the chemical name for each structure.)

a. What elements are contained in hydrocarbons?
Verified step by step guidanceKey Concepts
Hydrocarbons
Types of Hydrocarbons
Functional Groups
d. What is the empirical formula for octane?
b. Write a structural formula for 1-pentanol.
Write the chemical formula for each substance mentioned in the following word descriptions (use the front inside cover to find the symbols for the elements you do not know). (b) On treatment with hydrofluoric acid, silicon dioxide forms silicon tetrafluoride and water. (use the front inside cover to find the symbols for the elements you do not know). (c) Sulfur dioxide reacts with water to form sulfurous acid. (use the front inside cover to find the symbols for the elements you do not know). (d) The substance phosphorus trihydride, commonly called phosphine, is a toxic gas. (e) Perchloric acid reacts with cadmium to form cadmium(II) perchlorate.
Assume that you encounter the following sentences in your reading. What is the chemical formula for each substance mentioned? (c) Hydrogen cyanide is a very poisonous gas.
