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Twenty grams of a solute is added to 100g of water at 25 degrees C. The vapor pressure of pure water is 23.76mm; the vapor pressure of the solution is 22.41mm.
A.) Calculate the molecular weight of the solute.
B.) What weight of this solute is required in 100g of water to reduce the vapor pressure to half the value for pure water?
You have discovered a basic amino acid. its carboxyl group pKa is 1.92. its amino group pKa is 10.03. its side chain pKa is 11.98. What is its pl
Imagine that you model your lungs as a 5 L sealed balloon at sea level: Estimate the volume of your lungs at 100 m below the sea level.
The purity of gold alloys is expressed in karats, which is the mass fraction of gold multiplied by 24. Pure gold is 24 kt, whereas 10 kt gold jewelry typically contains 41.666667% gold, 29.166667% silver and 29.166667% copper (by mass).
If insulin were treated with mercaptoethanol to break its disulfide bonds, and then the mercaptoethanol were removed so that disulfide bonds could re-form, how many different wyas could the two polypeptide chains become linked to each other (assum..
a list the products ofthe reaction if equimolar amounts of aqueous solutions of feno33and nancs are mixed.b write the
Calculate the number of kilograms of helium needed to inflate a balloon to a volume of 100,000 L at an atmospheric pressure of 250 mmHg and a temperature of -35 °C.
a volume of 80.0 ml of rm h2o is initially at room temperature 22.0rmcircc. a chilled steel rod at 2.00rmcircc is
An analysis had to be done in within and hour on a sample that clearly had a significant amount of water associated with it. Therefore, part of the sample was dried for an hour and part of the undried sample was assayed during the hour.
Structures of Acids, The chiral carboxylic acid A (C5H6O2) reacts with 1 mol of hydrogen gas on catalytic hydrogenation.
A ground state hydrogen atom absorbs a photon of light having a wavelength of 93.06 nm. It then gives off a photon having a wavelength of 1.0 × 103 nm.
The melting point of a newly discovered element is 1935.4°F. Express this temperature in degrees Celsius.
Calculate the amount of solution that contains 8.0g calcium cloride (CaCl2) from 35% solution of CaCl2?
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