a. What do you understand by the term chemical formula?

b. What information is given by the formula ${NH}_{3}$ ?

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Solution

a. The chemical formula of a compound means the symbolic representation of the composition of a compound.

b.
(i) It represents the compound Ammonia.
(ii) It says that Ammonia contains two elements: Nitrogen and Hydrogen.
(iii) It says that one molecule of ammonia contains one atom of nitrogen and 3 atoms of hydrogen.

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