Calculate the mass of urea
Calculate the mass of urea that should be dissolved in 225 g of water at 35°C to produce a solution with a vapor pressure of 37.1 mmHg.
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A coffee-cup calorimeter is calibrated by adding 1840 J of heat to the water in the calorimeter and measuring a 1.72C rise in temperature. When some NH4NO3(s) is added to the same water in the calorimeter, the temperature falls by 1.04C. Calculate
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