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Question

Gram molecular weight of ammonia NH3 is:
  1. 10 g
  2. 45 g
  3. 17 g
  4. 20 g


Solution

The correct option is C 17 g

Molecular weight of ammonia NH3 can be calculated by calculating the weight of one atom of nitrogen and three atoms of hydrogen.
Weight of one mole of N atoms = 14 g
Weight of one mole of H atom = 1 g

Molecular weight of ammonia = 14 × (1) + 3 × (1) = 17 g.

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