1.

Write the molecular formulae of the following compounds.1)Potassium Chloride 2)irin Sulphide 3)Hydrogen lodide4) Skdium Chlorids 5) Hydrochloric acid​

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Answer:

A chemical FORMULA is the representation of substance by SYMBOLS and it denotes the number of atoms of each element present in the compound. To write a formula one must know the symbols and VALENCIES of the elements.The VALENCY of Hg=2 and of Cl=1 so the formula is HgCl

2

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