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3 August, 16:12

An alloy contains 56 g of pure silver and 22 g of copper. What is the percentage of silver in the alloy.

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  1. 3 August, 18:13
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    Find the molar mass of both of them so Cu is 63.5g/mol and Ag is 107.8g/mol and then divide the mass in grams for each by the molar mass of each to get the number of moles so 56g/107.8g=.52moles and 22g/63.5g=.35moles. Add the number of moles together and divide the number of moles of silver by that sum so. 52mol+.35mol/.35=2.4*100%.
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