% w/w means mass solute/100 g soln.
mass solute = 12.0 g NaCl.
mass solvent = 100 g
mass solution = 100g + 12g = 112g.
%w/w NaCl = (12.0/112)*100 = ?
What is the weight/ weight% of a solution made by dissolving 12.0g of NaC1 in 100.0 g of water?
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