If the pressure, volume, and number of moles of a gas are known, the temperature is required to calculate the universal gas constant using the ideal gas law.

To calculate the universal gas constant (R) using the ideal gas law, you need to know the pressure (P), volume (V), number of moles (n), and temperature (T) of the gas. The ideal gas law can be written as:

PV = nRT

Where: - P is the pressure of the gas - V is the volume of the gas - n is the number of moles of the gas - T is the temperature of the gas in Kelvin (K) - R is the universal gas constant we want to determine

In this case, you have the values for P, V, and n, but you need the temperature to solve for R. Once you acquire the temperature in Kelvin, you can rearrange the ideal gas law to solve for R:

R = PV / (nT)

Now you simply need to plug in the known values (making sure that the units of pressure and volume are consistent with R's units), calculate the right side of the equation, and you will have the value of R in those units.