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The Kf of biphenyl is found as 85.1 degrees C/m. What is the molar mass of the unknown solution containing 1.01 g of unknown in 17.74 g biphenyle froze at 42 degrees C. Pure biphenyl freezes at 71.0C
The vapor pressure of pure methanol, CH3OH, at 30 °C is 160. torr. How many grams of the nonvolatile solute glycerol, C3H5(OH)3, must be added to 131. g of methanol to obtain a solution with a vapor pressure of 133. torr?
How many moles of carbon, hydrogen, & oxygen are present in a 100g sample of ascorbic acid? Ascorbic acid (vitamin C) contains 40.92% carbon, 4.58% hydrogen, and 54.50% oxygen by mass. Assume a 100 g sample of ascorbic acid.
If 25.0 mL of NO2 gas is completely converted to N2O4 gas under the same conditions, what volume will the N2O4 occupy?
If a raindrop weighs 56 mg on average and 5.1 multiplied by 105 raindrops fall on a lawn every minute, what mass (in kg) of rain falls on the lawn in 4.0 h?
When you analyze the proteins by electrophoresis, you find that protein B moves further towards the positive end of the gel. Explain if this result is consistent with your hypothesis about the difference between the two proteins.
if the initial concentration of the reactant in a first-order reaction A-> products is 0.64 mol/L and the half-life is 30.0 s. what is the concentration after 60 s.
a cylinder measuring 5.7 cm wide and 6.8 cm high is filled with gas. The piston is pushed down with a steady force measured to be 11 N.
What is the magnetic field strength of the NMR system in Tesla? Show all equations and explain. c) Are the resonances of A and B well enough resolved to be able to measure the relative concentrations by NMR? Explain reasoning.
The component of structure responsible for holding the 4 chains of hemoglobin together is a. primary
A solution of ethanol (C2H5OH) in water is prepared by dissolving 58.0 mL of ethanol (density = 0.79 g/cm3) in enough water to make 235.0 mL of solution. What is the molarity of the ethanol in this solution?
how many joules of heat are needed to raise the temperature of 591 grams of water from 25C to 55C?
514 mL of sulfuric acid is exactly neutralized with 453 mL 0.180 M lithium hydroxide solution. What is the concentration of the acid solution?
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