An unknown gas was tested to find the molar mass: a glass bulb with a volume of 125.00 mL was evacuated (all the air was pumped out) and weighed.
gas-sampling-tube-with-stopcocks-laboratory-125-ml-22292.png
The bulb was then filled with the unknown gas up to a pressure of 891 torr and weighed again. The difference in the mass was 0.430 g (this is the mass of the gas sample). The temperature was 21.50 °C.
Calculate the molar mass of the unknown gas. Which gas was it?
Group of answer choices
Cl2
Xe
CO2
Ne
F2