Methanol is the substance that can be broken down by chemical means, the remaining ones are elements.
0.0024 Is it rounded to four significant figures
Answer: When a substance is pure, it is composed of one type of molecule. For example, table salt is only composed of (more or less) salt molecules, while seawater has water and salt molecules. A more complicated example of a non - pure substance is soil. It has many different types of nutrients and compounds.
