1.

The numbe of moles of oxygen obtained by the electrolytic decomposition of 108 g water is

Answer»

2.5
3
5
7.5

Solution :`{:(2H_(2)O overset("electrolysis")(rarr)2H_(2)+O_(2)),("2 mole1 mole"),(2xx18),(=36 G):}`
`:'` 36 g of `H_(2)O` PRODUCE 1 mole of oxygen
`:.` 108 g of water will produce oxygen `=108/36=3` mol.


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