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Which one of the following aqueous solutions has a freezing point of –2.60°C? (Kf for water is 1.86°C/m)?

Which one of the following aqueous solutions has a freezing point of –2.60°C? (Kf for water is 1.86°C/m)

A. 1.30 m Na2CO3(aq)

B. 0.47 m NaBr(aq)

C. 0.20 m K2SO4(aq)

D. 0.35 m AlCl3(aq)

E. 0.24 m CH3OH (aq)

How do I solve this problem using change in temperature= H freezing times molality?

Can you please show me the work?

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