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organicstars801

Answer:

  • 120 Oxygen atoms

Data given

  • Formula unit of AL2(SO4)3 =10
  • 1 formula unit of AL2(SO4)3  contain oxygen atoms = 12
  • 10 formula unit of AL2(SO4)3  contain oxygen atoms = 12 × 10
  • 1 formula unit of AL2(SO4)3  contain oxygen atoms = 120

there are 120! because:

04 multiplied by 3 to make 12,

and since there are 10 units,

you multiply 12 by 10,

you get 120 oxygen atoms!

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