Chemistry

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How many Silver Coins (weighing 26g each) would it take to provide 5 moles of Silver (Ag)?

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    5 moles Ag = 5*atomic mass Ag = ?? grams. But Ag coins are not pure Ag; in fact the percentage varies and some contain no Ag at all.
    ??grams Ag/percent(as a fraction) = ??grams coins.
    Then ??g coins/26 = # coins

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