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A hot air balloon is filled with air to a volume of 4.00x10^3 meters cubed at 745 degrees celcius.

A hot air balloon is filled with air to a volume of 4.00x10^3 meters cubed at 745 degrees celcius. the air in the ablloon is then heated to 62 degrees celcius, causing the balloon to expand to a volume of 4.20x10^3 meters cubed. What is the ratio of the number of moles of air in the heated balloon to the original number of moles of air in the balloon? (Hint: Openings in the balloon allow air to flow in and out. Thus the pressure in the balloon is always the same as that of the atmosphere.)

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