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In the reaction, N subscript 2 end subscript O subscript 4 end subscript rightwards harpoon over leftwards harpoon 2 N O subscript 2 end subscript comma blank alpha is that part of N subscript 2 end subscript O subscript 4 end subscript which dissociates, then the number of moles at equilibrium will be

  1. 1  
  2. 3  
  3. open parentheses 1 plus alpha close parentheses  
  4. open parentheses 1 minus alpha close parentheses to the power of 2 end exponent  

The correct answer is: open parentheses 1 plus alpha close parentheses


    N subscript 2 end subscript O subscript 4 end subscript rightwards harpoon over leftwards harpoon 2 N O subscript 2 end subscript

    open parentheses 1 minus alpha close parentheses blank 2 alpha at equilibrium
    Total moles at equilibrium equals open parentheses 1 minus alpha close parentheses plus 2 alpha
    equals 1 plus alpha

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