what would be the new pressure if 500 cm3 of gas at standard pressure is compressed to a volume of 250 cm3 (temperature and amount of moles is held constant)

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metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

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