Lab - Foxy - Boyle-Mariotte Law

Excerpt from the syllabus for 10th grade:
Pressure: Boyle-Mariotte's Law, a model of gas behavior, its limitations.
Knowing that, at a given pressure and temperature, a given number of molecules occupies a volume independent of the nature of the gas.

Objective of the experiment:
The purpose of this lab is to demonstrate Mariotte's Law.
At constant temperature, for a given amount of gas, the product of the pressure P by the volume V of this gas remains constant: P × V = constant.