The mass of oxygen is 32 u(atomic mass unit). How many molecules of oxygen are in 32 g of oxygen?

  • (A) 1×(6.022×1023) molecules
  • (B) 1×(6.022×1018) molecules
  • (C) 1/2×(6.022×1023) molecules
  • (D) 1/2×(6.022×1022) molecules

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