In the gas equation PV = nRT, the value of n depends upon — States of Matter and Gaseous State Chemistry Question

💡 Solution & Explanation

# Analysis of the Ideal Gas Equation: PV = nRT **Understanding what n represents:** In the ideal gas equation $PV = nRT$, the variable $n$ represents the **number of moles** of gas present. **What n depends upon:** The number of moles depends on: - **Mass of the gas sample** ($m$) - **Molar mass of the gas** ($M$) $$n = \frac{m}{M}$$ **Why n is independent of other variables:** - $n$ is **NOT dependent** on pressure ($P$), volume ($V$), or temperature ($T$) - These are state variables that *change* based on the amount of gas present - The amount of gas (moles) is a fixed property of the sample itself **Conclusion:** Since the correct answer is **A** (which typically states "the amount/mass of the gas" or "the number of moles"), the value of $n$ depends on the **quantity of substance** — specifically the mass and molar mass of the gas, not on external conditions like pressure, volume, or temperature.