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how many grams of water must be added to 75.5 grams of Ca(NO3)2 to for a 0.500 m solution

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m as in molality? Normally this question is Molarity.

molality= molesSolute/kg of water

.5= moles/1000*grams water

gramswater= 75.5g/(molmass*1000*.5)

solve for grams water.

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