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In which of the following chemical equations, the abbreviations represent the correct states of the reactants

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Question: In which of the following chemical equations, the abbreviations represent the correct states of the reactants and products involved at reaction temperature?

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  1.  2H2 (l) + O2 (l) → 2H2O (g)
  2.  2H2 (g) + O2 (l) → 2H2O (l)
  3.  2H2 (g) + O2 (g) → 2H2O (l)
  4.  2H2 (g) + O2 (g) → 2H2O (g)

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3. 2H2 (g) + O2 (g) → 2H2O (l)

The chemical equation, 2H2 (g) + O2 (g) → 2H2O (l) represent the correct states of the reactants and products involved at reaction temperature.

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