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Molecular formula : MW : CAS :
nature : metal (or hydrogen) and arsenic compounds. Some exist in nature, such as arsenic Cu3 As copper, iron ore oblique side FeAS2 arsenic, arsenic and other CoAs2 cobalt ore. Alkali - metal arsenic (As Na3As, K3As) easily react with water to form hydrogen and hydroxide arsenide, most metals arsenic from metal and arsenic compound and directly obtained.
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