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The vapor pressure of water at 45.0 degrees C is 71.93 mmHg. What is the vapor...

The vapor pressure of water at 45.0 degrees C is 71.93 mmHg. What is the vapor pressure of water over a solution prepared from 75.0 g of citric acid (C6H8O7) (a nonelectrolyte) in 0.420 kg of water at this temperature?
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