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A bag contains a mixture of copper and lead BB's. The average density of the BB's is 9.87 g/cm^3. Assuming that copper and lead are pure, determine the relative amounts of each kind of BB.

  • chemistry -

    Density Pb = 11.4
    Density Cu = 8.96
    You need to confirm these.
    Let x = fraction Pb BBs, then
    1-x = fraction Cu BBs.

    11.4(x) + 8.96(1-x) = 9.87
    Solve for x, then evaluate 1-x.

    check my work. Check my thinking.

  • chemistry -

    What do you do next?

  • chemistry -

    Solve for x. After you know x, you can find 1-x. x is lead and 1-x is Cu.

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