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Yes. Generally, chemical names ending with -ate have three (or more) oxygen atoms in it.


  • sulfate - SO42-
  • carbonate - CO32-
  • nitrate - NO3-

The other suffixes are -ite (less oxygen atoms) and -ide (no oxygen atoms (?)).

  • sulfite - SO32-
  • nitrite - NO2-

Potassium sulfate / sulphate - K2SO4

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