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1. Determine the number of diatomic nitrogen (N2) molecules in 1 in3 at 70.0°F and a pressure of 1.00 × 10-10 mm of mercury absolute (a very high vacuum).

2. Determine the mean free path and the collision frequency of diatomic nitrogen at 1000. K and 10.0 MPa. The effective radius of the nitrogen molecule is 1.10 × 10-10 m.

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