n electronic vacuum tube was sealed off during manufacture at a pressure of 1.8 x 10-5 mm of Hg and at 27°C. Its volume is 250 mL. How many gas molecules remain in the tube? 2.45 x 1013 molecules 2.40 x 1010 molecules 1.45 x 1014 molecules 14.50 x 1016 molecules

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