A group 3A metal has a density of 2.70 g>cm3 and a cubic unit cell with an edge length of 404 pm. Reaction of a 1.07 cm3 chunk of the metal with an excess of hydrochloric acid gives a colorless gas that occupies 4.00 L at 23.0 °C and a pressure of 740 mm Hg.
(a) Identify the metal.
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