The rate of effusion of oxygen to an unknown gas is 1.49. what is the other gas?

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Answer is: the other gas is chlorine (Cl ₂). rate of effusion of oxygen : rate of effusion of gas = 1.49 : 1. rate of effusion of oxygen = 1/√M(O ₂).rate of effusion of oxygen = 1/√32. rate of effusion of oxygen = 0.176. rate of effusion of gas = 1/√M(gas). rate of effusion of oxygen = rate of effusion of gas · 1.49. 1/√M(gas) = 0.176 1.49 1/ √M(gas) = 0.118.√M(gas) = 1 ÷ 0.118 = 8.46. M(gas) = 8.46² = 71.5.

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