(a) Rms speed:
For Helium, M = 4g = 4 ×10-3 kg, R = 8.314 J/mol K (gas constant), and T = 0 + 273.15 = 273.15 K.
(a) Calculate the rms speed of a helium atom at 0°C.
(b) Determine how many times per second it would move back and forth across a 7.0 m long room on the average, assuming it made very few collisions with other molecules.
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