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About how much sucrose (342 g/mol) must be added to 500 g water to raise its boiling point by 0.37 K (Kb = 0.52)?
A62 g
B342 g
C12 g
D122 g
Answer & Solution
Correct answer: D. 122 g
m = 0.37/0.52 = 0.712 mol per kg, so 0.356 mol in 0.5 kg weighs about 122 g.
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