pls answer using photo. and also consider units.
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Answer:
Mass of solute A = 2 g
Mass of solvent water = 18 g
Mass percent of solute = ( Mass of solute / Mass of solution ) * 100
= ( 2 / ( 2 + 18 ) ) * 100
= ( 2 / 20 ) * 100
= 0.1 * 100
= 10
Therefore , mass percent of solute = 10 %
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