Which of the following would not be classified as a pure substance?
glucose (C6H12O6)
P4
propane (C3H8)
gasoline
Gasoline
Gasoline would not be classified as a pure substance.
To determine which of the following substances would not be classified as a pure substance, we need to understand what a pure substance is. A pure substance is a type of matter that has a uniform composition and distinct properties. It is made up of only one type of particle, either atoms or molecules.
Now, let's analyze each option:
1. Glucose (C6H12O6): Glucose is a type of sugar, and it is composed of carbon, hydrogen, and oxygen atoms. Since it consists of only one type of molecule (C6H12O6), it is considered a pure substance.
2. P4: P4 is the chemical formula for phosphorus, consisting of four phosphorus atoms bonded together. Since it is made up of only one type of molecule, phosphorus is also a pure substance.
3. Propane (C3H8): Propane is a hydrocarbon gas composed of carbon and hydrogen atoms (C3H8). Similar to glucose and phosphorus, propane consists of only one type of molecule. Therefore, it is a pure substance.
4. Gasoline: Gasoline is a complex mixture of hydrocarbon compounds, typically containing hundreds of different molecules. It consists of various components such as octane, heptane, and additives. Since it is not made up of a single molecule or type of particle, gasoline is not classified as a pure substance.
In conclusion, the substance that would not be classified as a pure substance from the given options is gasoline.