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Blue vitriol is a common name for an ionic compound that has many purposes in industry,...

Blue vitriol is a common name for an ionic compound that has many purposes in

industry, including the production of germicides, pigments, pharmaceuticals, and

wood preservatives. A sample contains 20.238 g of copper, 10.213 g of sulfur,

and 20.383 g of oxygen. What is its empirical formula? What is its name?

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