To identify a diatomic gas (x2), a researcher carried out the following experiment: She weighed an empty 3.4L- bulb, then filled it with the gas at 1.20 atm and 22.0 C and weighed it again. The difference in mass was 4.7g . Identify the gas.

Question

To identify a diatomic gas (x2), a researcher carried out the following experiment: She weighed an empty 3.4L- bulb, then filled it with the gas at 1.20 atm and 22.0 C and weighed it again. The difference in mass was 4.7g . Identify the gas.
Express your answer as a chemical formula.

DrBob222 · Answer

n = PV/RT amd solve for n. Then n = grams/molar mass Something like 28 g. Could be N2. Could be C2H4 (ethylene). N2 is a diatomic gas, ethylene is not.