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Two flasks ' A' and ' B ' have equal vol...

Two flasks ' A' and ' B ' have equal volumes. Flask ' A ' contains 'H_2' and is maintained at '300 K' while 'B' contains equal mass of 'CH_4' gas and is maintained at '600 K'.
i. Which flask contains greater number of molecules? How many times more?
ii. In which flask pressure is greater? How many times more?
iii. In which flask molecules are moving faster?
iv. In which flask the number of collisions with walls are greater?

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