Understanding the Key Concepts
* STP (Standard Temperature and Pressure): STP is defined as 0°C (273.15 K) and 1 atmosphere of pressure.
* Avogadro's Law: This law states that equal volumes of gases at the same temperature and pressure contain the same number of molecules.
* Molar Volume: At STP, one mole of any ideal gas occupies a volume of 22.4 liters.
The Answer
Since Avogadro's Law tells us that equal volumes of gases at STP have the same number of molecules, any two samples of gas at STP that have the same volume will contain the same number of molecules.
Example
* 1 liter of nitrogen gas (N₂) at STP will contain the same number of molecules as 1 liter of oxygen gas (O₂) at STP.
Important Note: This principle applies to ideal gases. Real gases may deviate slightly from ideal behavior, but the concept still holds true for most practical purposes.
