34.2 g of glucose is dissolved in 400 g of water. Calculate percentage by mass of glucose solution. (7.87 w/w)
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Answered by
6
Answer:
7.87% w/w
Explanation:
Mass% = (Mass of solute / Mass of solution) × 100
= [34.2 g / (400 g + 34.2 g)] × 100
≈ 7.87
Answered by
4
34.2 g of glucose is dissolved in 400 g of water. Calculate percentage by mass of glucose solution...
solution : mass of glucose (solute) = 34.2g
mass of water (solvent) = 400g
so, mass of solution = mass of solute + mass of solvent
= mass of glucose + mass of water
= 34.2g + 400g
= 434.2g
now,
% by mass of glucose solution = mass of solute/mass of solution × 100
= 34.2/434.2g × 100
= 3420/434.2 %
= 7.876554 ≈ 7.87 % (w/W)
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