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a mixture of NaBr & NaCl has a mass of 2g & found to contain 0.75g of Na. What is the mass of NaBr in the mixture?

  • chem - ,

    NaBr = molar mass NaBr
    NaCl = molar mass NaCl
    Na = atomic mass Na.
    Let x = NaCl
    y = NaBr
    --------------------\
    x + y = 2
    x(Na/NaCl) + y(Na/NaBr) = 0.75
    Solve the two equations simultaneously fo x and y.

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