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2.5 g of ethanoic acid (60 g/mol) is dissolved in 75 g of benzene. What is the molality?
A0.033 m
B0.556 m
C0.417 m
D0.0417 m
Answer & Solution
Correct answer: B. 0.556 m
2.5/60 is 0.0417 mol, and dividing by 0.075 kg of benzene gives 0.556 mol per kg.
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