Number of moles of \( \mathrm{CaO} \) required to remove hardness from 1000 litre water having \...

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Number of moles of \( \mathrm{CaO} \) required to remove hardness from 1000 litre water having \( 324 \mathrm{ppm} \) of calcium bicarbonate and \( 74.5 \mathrm{ppm} \) of potassium chloride is :
\( \mathrm{P} \)
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