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What happened to the number of moles in a sample that originally occupied 500mL with 2.50 moles and then occupied 750mL?

It deals with gas laws

Answer :

Either you have added an extra half of the # of moles or you changed the condition (lower the pressure or increase the temp.)
bigdammy2013

Answer: The number of moles that initially occupied a 250ml container remains the same when it occupied 750ml container but they are freer because the 750ml container is bigger and has more space. So the gases now occupied more space and their movement is less curtailed unlike when they were in 250ml container

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