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(a) An ideal gas occupies a volume of 1.8 cm3 at 20°C and atmospheric pressure. Determine the number of molecules of gas in the container.
molecules
(b) If the pressure of the 1.8-cm3 volume is reduced to 1.8 × 10?11 Pa (an extremely good vacuum) while the temperature remains constant, how many moles of gas remain in the container?
mol
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