Grade 11Physical Chemistry
The number of moles of oxygen obtained by the electrolytic decomposition of 90 g water is
2 Answers
Mohit
Electrolytic decomposition of 18g of water gives 0.5 mole O2.So 90g of water will give (0.5/18)*90=2.5 moles O2
Anubhav
Number of Moles n=Amount of waterMolecular mass of waternAmount of waterMolecular mass of waterWe know that the molecular mass of water =18gmol−118gmol1⇒n=90g18gmol−1n90g18gmol1=5mol
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