According to Avogadro's law, what is true about equal volumes of gases under the same conditions?

Avogadro's law states that, at the same temperature and pressure, equal volumes of all gases contain an equal number of molecules, regardless of the type of gas. This principle is fundamental in understanding gas behavior and stoichiometry in reactions involving gases.

When gases are in the same conditions of temperature and pressure, they behave in a predictable way, allowing for comparisons across different substances. Therefore, it is accurate that equal volumes of different gases must contain the same number of molecules. This means that if you have one liter of oxygen gas and one liter of nitrogen gas at the same temperature and pressure, you will find that they each contain the same number of molecules, even though they are different gases.

The other options do not align with the principles established by Avogadro's law. For instance, different gases can indeed have different molecular weights, which does not affect the equality in the number of molecules at the same volume. Additionally, masses will vary due to differences in molecular weights, and while gases can react in volumes according to stoichiometric relationships, this reflects reaction conditions rather than Avogadro's principle directly. Thus, the correct statement, according to Avogadro's law, is that equal volumes of gases under identical conditions contain