Avogadro's Law is a scientific rule that tells us about gases. It says that if you have equal amounts of space (or volume) of different gases, and they are all at the same temperature and pressure, those gases will have the same number of tiny particles called molecules.

We can write this idea in a simple math way:

$V \propto n$

In this equation, $V$ means volume, and $n$ means the number of moles.

Here are some important points to remember:

• When we talk about Standard Temperature and Pressure (STP), which is 0°C and 1 atm (a standard measurement for pressure), 1 mole of an ideal gas will fill up 22.4 liters.

• This means if the volume of gas gets bigger, the number of moles also gets bigger. This helps us understand how gases behave.

• For example, if we double the space from 22.4 liters to 44.8 liters, the number of moles will also double. So, 1 mole will turn into 2 moles.

So, Avogadro's Law shows a neat relationship between gas volume and the number of molecules!