The mass of an evacuated 255-mL flask is 143.187 g. The mass of the flask filled with 267 torr of an unknown gas at 25 °C is 143.289 g. Calculate the molar mass of the unknown gas.
Here, we are going to calculate the molar mass of the unknown gas.
From ideal gas equation
Since = ----(2)
Rearrange the equation (1) by using equation(2)
Or M =----(3)