ALEKS Chemistry Placement Exam Practice – Complete Preparation 2026

Boyle's Law describes the relationship between pressure and volume of a gas at a constant temperature. According to this law, when the volume of a gas decreases, the pressure increases, provided the temperature remains constant. Mathematically, it can be expressed as P1V1 = P2V2, where P represents pressure and V represents volume. This means that pressure and volume are inversely related; as one goes up, the other goes down.

In this context, the other options do not describe Boyle's Law. The relationship between volume and number of moles relates more closely to Avogadro's principle, while the relationship between pressure and temperature pertains to Gay-Lussac's law. Lastly, the relationship between temperature and number of moles isn't directly described by any of these gas laws. Therefore, the correct association for Boyle's Law is indeed between pressure and volume.