What is the atomic mass of $Fe$?
Given abundance of ${}^{54}Fe = 10\%$,${}^{56}Fe = 85\%$,and ${}^{57}Fe = 5\%$.

  • A
    $55.65$
  • B
    $55.75$
  • C
    $55.85$
  • D
    $55.95$

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