1.

Deduce the molecular formulae of the compounds formed from the following pairs of elements.(i) H (valency) and O (valency 2)(ii) N (valency) and H (valency 1)(iii) Fe (valency) and S (valency 2)

Answer» H2O( WATER)
NH3(AMMONIA)
Fe2S3(ferric SULPHIDE)


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