Question

4. 1.10 mol of ozone (O3) in a container took 28.4 seconds to effuse through a pinhole into a vacuum. Under the exact same conditions, 1.10 mol of an unknown gas took 70.1 seconds to effuse. a) What is the molar mass of the unknown gas (in g/mol)? Do not try to identify the gas. (2 marks) b) What is Urms of the ozone gas at a temperature of 37"C? Express your answer in m/s. (2 marks)

Answer 1

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We know rate of diffusion care o diffusion = moles diffused = mor time taken TS = f02 Dmole 2864 Sec 1-omole = Unknown 70.1 sec Tomole/29.4sec Munknown Lompleto. Sec 28 gr/mol Muntanon - a) x 48 syland = 232,44 gr mod] thomas t ax authentico) x b) formula wood llon 3RT = 13x18.314 kg m2) * 310K !ומה 48 x103 kg/mol T-37°C = 310K Imolk =48x10 kg/mol. = 8.314x kg me 52 molk we know Joule = Nom kg xm .m = 48 gm/mo. R=8-314x J/ . Moms – 401-35 m/sec) Scanned with CamScanner :