Which of the following formulae is correct for calculating the number of moles?

  • A
    Mole $= \frac{\text{Molecular mass}}{\text{Weight}}$
  • B
    Mole $= \frac{\text{Weight}}{\text{Molecular mass}}$
  • C
    Mole $= \frac{\text{Weight}}{\text{Litre}}$
  • D
    Mole $= \frac{\text{Molecular mass}}{\text{Litre}}$

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