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4.59 Aluminum dissolves in HCI according to the equation written below, whereas copper does not react with HCl.
A 35.0-g sample of a copper—aluminum alloy is dropped into 750 mL of 3.00 M HCl, and the reaction above proceeds as far as possible. If the ahoy contains 77.1% Al by mass, what mass of hydrogen gas would be produced?
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