The vapor pressure of ethyl alcohol, C2H5OH is 100 mmHg at 30 ℃ . Predict the vapor pressure of the solution of 12 g urea, (NH2)2CO in 60 g ethyl alcohol at 30 ℃. ROUND OFF YOUR ANSWER INTO TWO DECIMAL PLACES
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Step 1
Molality (m) = moles of solute / mass of solvent (in kg) First, we need to find the moles of urea and convert the mass of ethyl alcohol to kg. Molar mass of urea = (2 * 14) + (4 * 1) + 12 + 16 = 60 g/mol Moles of urea = 12 g / 60 g/mol = 0.2 mol Mass of ethyl Show more…
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