A chemist half-fills a 500-mL beaker with a saturated solution of sodium nitrate (NaNO3) and water at room temperature. How could the chemist increase the concentration of NaNO3 in the solution?

law of conservation of matter

distance, luminosity, brightness, radius, chemical composition, and temperature

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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