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Consider a mixture of helium and neon at room temperature =(300k) both are monatomic and to a very good approximation ideal gasses. What is the typical speed of a helium atom ? Neon atom?

What about their individual( partial) pressure? Consider a head on collision between two such atoms that is one neon and another helium , and evaluate the velocities of atoms after the collision. What is the probability of the inverse process?

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