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Question
If the valency of hydrogen is 1 and that of nitrogen is 3, work out the formula for ammonia.
Solution
Valency of hydrogen = 1
Valency of nitrogen = 3
Elements : N H
Valencies : 3 1
Ammonia consists of nitrogen and hydrogen.
Formula for ammonia can be worked out by crossing the valencies of the constituent elements.
Therefore, formula of ammonia is NH3.
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