Molality of 10% w/w of NaOH is?
10% w/w of NaOH means 10g of NaOH present in 100g of solution
weight of solvent = weight of solution - weight of solute
= 100-10 = 90g
molality = W*1000/G.M.Wt* weight of solvent in g
= 10*1000/40*90 = 2.78m >>>>>answer
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