What is the volume of $n$ moles of gas? Derive the formula for the combined gas law.

(N/A) Volume of $n$ moles of gas: According to the ideal gas equation,$pV = nRT$.
Therefore,$V = \frac{nRT}{p}$.
If the temperature $(T)$,pressure $(p)$,and amount of gas $(n)$ are held constant,the volume $(V)$ is determined by these parameters.
Combined Gas Law:
Starting from the ideal gas equation: $pV = nRT$.
Rearranging the terms,we get: $\frac{pV}{T} = nR$.
Since $n$ (number of moles) and $R$ (universal gas constant) are constants for a fixed amount of gas,we can write: $\frac{pV}{T} = \text{constant}$.
If the state of a fixed amount of gas changes from $(p_1, V_1, T_1)$ to $(p_2, V_2, T_2)$,then:
$\frac{p_1 V_1}{T_1} = \frac{p_2 V_2}{T_2}$.
This equation is known as the combined gas law.