If copper is heated in the presence of an excess of chlorine gas, how much metal is needed to make 12.20 g CuCl2?
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Expert's answer
2013-07-24T08:10:37-0400
To solve this problem we must write the equation of chemical reaction:
Cu + Cl2 = CuCl2
Then suppose that x is mass of metal needed forreaction. The molar mass of Cu is 64; the molar mass of CuCl2 is 135. So, we can find x: x = (64*12.20)/135 = 5.78g
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