One mole of a gas represents......

  • A
    Number of molecules in $1 \ L$ of gas
  • B
    Number of molecules in $1 \ g$ of gas
  • C
    Number of atoms in $12 \ g$ of $^{12}C$ isotope
  • D
    Number of molecules in $22.4 \ L$ of gas at $S.T.P.$

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