An alloy of gold and copper crystallizes in a cubic lattice in which the gold atoms occupy the lattice points at the corners of a cube and copper atoms occupy the centers of each of the cube faces. Determine the formula of this compound.

  • A
    $AuCu$
  • B
    $AuCu_2$
  • C
    $Au_2Cu$
  • D
    $AuCu_3$

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