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Calculate the molar mass of gas Q using effusion times of gases He and Q with known volumes. Gas Q's molar mass formula is derived based on the given data. Utilize the effusion rates to determine the molar mass.
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Time of effusion of 10.0 cm3 He gas and 20.0 cm3 Q gas are 5 s and 7.1 s respectively. What is the M of Q gas? (Aw He=4)