Question

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QUESTION 1 A gas effusion cell is loaded with O2 gas at STP it take 34 seconds 0.010% of the gas to effuse through the hole. Under the same conditions, an unknown gas takes 59.4 seconds for 0.010% of gas to effuse through the hole. Based on these data, what is the molar mass of the unknown gas (in g/mol)? QUESTION 2 A sample of gas is contained in a cylinder with a movable piston. The initial conditions of the gas are illustrated in diagram (1), where each particle drawn represents 0.1 mol and the relative volumes can be judged by the illustration. OOK- (1) T-325 K n=0.6 mol Which diagram (2)-(4) most closely represents the result of doubling the pressure AND doubling the number of moles of gas AND doubling the temperature?

Answer 1

Perticles (gas). sontainer (1) contain 0.6 mol and Temperature = 325k. Pressure = t atm. u know that, if Temperature increases at constant pressure, volume will increase. Remembering thin we will constract the following table container & Container 3 n=0.6x2 mol - 1.2 mer Container 4 n=0.6 x 2 mo - 1.2 mor n = 0.6x2 mol = 1.2mol P = zatm - zatm V = equal volume to containert P=ratin V = Half volume to continer t. V = double volume to Containert Container 3 represents the result where the pressure moles and temperature is double to the conteriner t o