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    caligirl0713's Avatar
    caligirl0713 Posts: 1, Reputation: 1
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    #1

    Dec 7, 2009, 04:48 PM
    how to write difficult questions into balanced equations
    Are 15g of chorine gas enough to replace 30.0g of bromine from a solution of sodium bromide?
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #2

    Dec 7, 2009, 08:33 PM

    Here, you have chlorine gas reacting with sodium bromide. Also, it is a displacement reaction, meaning that one element (or compound) will replace another one. This gives you:



    Then, you only need to balance:


    Using mole ratio, you can find the amount of moles of Chlorine reacting to produce a certain amount of Bromine. Find the weight of both, and find, using proportion, the ratio of mass between the two.
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