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80g NaOH was added to 2L water. Find mo...

`80g NaOH` was added to `2L` water. Find molality of solution density of water `=1g//mL` .

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`m = ("moles of " NaOH)/("mass of "H_(2)O) xx 1000 = (80//40)/(2 xx 1000) xx 1000 = 1` molal
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