Is oxygen gas a pure substance?

Understand the Problem

The question is asking whether oxygen gas can be classified as a pure substance or not. To answer this, we need to consider the definition of a pure substance, which is a material that has a uniform and definite composition. Oxygen gas (O2) consists of only one type of molecule and does not contain any other substances, which makes it a pure substance.

Answer

Oxygen gas is a pure substance.

Oxygen gas is a pure substance because it consists of only one type of molecule, which are oxygen molecules.

Answer for screen readers

Oxygen gas is a pure substance because it consists of only one type of molecule, which are oxygen molecules.

More Information

Oxygen is a chemical element and consists solely of oxygen molecules when it is in gaseous form, which qualifies it as a pure substance.

Tips

A common mistake is to confuse a pure substance with a homogeneous mixture. Ensure you understand that a pure substance contains only one type of particle.

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