Question

If the valency of hydrogen is 1 and that of nitrogen is 3 work out the formula for ammonia

Answer 1

Here is your answer

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Answer 2

Given:

Valency of hydrogen = 1

Valency of nitrogen = 3

To do:

Work out the formula for ammonia

Solution:

• The compound for which the formula must be worked is $NH_3$.
• The atoms involved in the formation of ammonia are nitrogen and hydrogen.
• When 1 atom of hydrogen combines with 3 atoms of nitrogen ammonia is formed.
• As the valency of atoms involved is given, with the help of the criss- cross method, the formula of ammonia can be worked out through the following steps:

Valency of Nitrogen (N) = 3

Valency of Hydrogen (H) = 1

On cross multiplication it gives:

1 N and 3H

∴ The formula is identified as $NH_3$

Conclusion:

Thus the formula of ammonia based on the given details is identified as $NH_3$

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