A student is given 1.5621 g of pure CuO. To recover the Cu present in the compound, the dark powdery solid was dissolved in 15.0 ML of 6 M HCl and the solution was diluted to 50.0 mL with water. How many grams of Mg is needed to displace all of the copper (II) ions from the solution? Mg(s) + Cu^2+(aq) --> Cu(S) + Mg^2+(aq)

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