Analysis of an organic compound shows $C = 40\%$,$H = 13.33\%$,and $N = 46.67\%$. Its empirical formula is ....

  • A
    $C_2H_7N_2$
  • B
    $CH_5N$
  • C
    $CH_4N$
  • D
    $C_2H_7N$

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