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JAMB Chemistry 1981 Question 11

Question 11

Mole Concept and Stoichiometry

In the reaction of oxygen with hydrogen to produce water, which of the following statements is true?

  1. A.One atom of hydrogen reacts with two atoms of oxygen to give one molecule of water.
  2. B.Two atoms of hydrogen react with two atoms of oxygen to give two molecules of water
  3. C.One molecule of oxygen reacts with one molecule of hydrogen to give two molecules of water
  4. D.One molecule of hydrogen reacts with two molecules of oxygen to give three molecules of water
  5. E.One molecule of oxygen reacts with two molecules of hydrogen to give two molecules of water.
Show the answer and explanation

Answer: E (One molecule of oxygen reacts with two molecules of hydrogen to give two molecules of water.)

Explanation

The balanced equation is 2H2 + O2 → 2H2O: two molecules of hydrogen and one of oxygen give two molecules of water.