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DO value of a water sample is 6 ppm. Cal...

`DO` value of a water sample is 6 ppm. Calculate the weight of dissolved oxygen present in 100 kg of water sample.

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DO value 6 ppm means. `10^(6)` g of water conatains 6g of dissolved oxygen.
`10^(6)` g water `rarr 6gO_(2)`
`100 kg (10^(5) g )` water `rarr (6 xx 10^5)/(10^6) = 0.6 g `
Amount of dissolved oxygen in water = 0.6 g
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