Consider the experimental apparatus shown. In this setup, each round flask contains a gas, and the long tube contains no gas (that is, it is a vacuum).
a. We use 1.0 mol of He for experiment X and 1.0 mol of Ar for experiment Y. If both valves are opened at the same time, which gas would you expect to reach the end of the long tube first?
b. If you wanted the Ar to reach the end of the long tube at the same time as the He, what experimental condition (that is, you cannot change the equipment) could you change to make this happen?

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Closed valve Experiment X Closed valve Experiment Y