hard · MCAT

A reaction involves 2 moles of H_2 and 2 moles of O_2 reacting to form H_2O according to the balanced equation 2 H_2 + O_2 rightarrow 2 H_2O.

Which of the following is true at the completion of the reaction?

  1. H_2 is the limiting reagent, and 1 mole of O_2 remains.
  2. O_2 is the limiting reagent, and all O_2 is consumed.
  3. 4 moles of H_2O are produced.
  4. Neither reactant is limiting as they are present in equal molar amounts.

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