What does Avogadro's Law state about the relationship between volume and the number of moles?

Avogadro's Law establishes that, under constant temperature and pressure conditions, the volume of a gas is directly proportional to the number of moles of that gas. This means that if you increase the number of moles of a gas, the volume will increase correspondingly, provided that temperature and pressure remain unchanged. This relationship can be mathematically expressed as ( V \propto n ), where ( V ) is the volume and ( n ) is the number of moles. This law is foundational in understanding gas behavior and is crucial for calculations in stoichiometry and gas laws.

The other options do not accurately represent Avogadro's Law. The first relates volume to pressure, which is a principle more aligned with Boyle's Law, while the third option pertains to the relationship between volume and temperature, corresponding to Charles's Law. The last option inaccurately suggests that volume does not change with the number of moles, contradicting Avogadro's Law entirely.