Asked by wynneh
                A bag contains a mixture of copper and lead BBs. The average density of the BBs is 9.60g/cm3.Assuming that the copper and lead are pure, determine the relative amounts of each kind of BB. 
Express your answers numerically separated by a comma.
            
            
        Express your answers numerically separated by a comma.
Answers
                    Answered by
            GK
            
    The density of Cu is 8.96 g/cm^3. The density of Pb is 11.4 g/cm^3. Let the mass fraction of copper, Cu = x, Then the mass fraction of Pb is (1-x). The algebraic expression for the "weighted" average density is:
8.96x + 11.4(1-x) = 9.60
Solve for x to get the mass fraction for copper. How would you get the mass fraction of Pb?
    
8.96x + 11.4(1-x) = 9.60
Solve for x to get the mass fraction for copper. How would you get the mass fraction of Pb?
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