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The vapour pressure of a substance at 20? is 58.0kPa and its enthalpy of vaporization is 32.7 kJmol-1. Estimate the temperature at which its vapour pressure is 66.0kPA
One liter of an acetate buffer is prepared by adding 60mL of 1.5M acetic acid and 50mL of 0.4M sodum acetate. Calculate the final concentrations of acetic acid and acetate
What percent of the Fe2(SO4)3 actually dissociates in water if the freezing point of a 0.105 m solution of this salt in water is -0.625C degree. The proportionality constants for h20 are Kf= 1.86 and kb =0.515 Can you help me out with solving..
what would the magnitude of q need to be to give the experimental dipole moment? Express your answer as q divided by the proton charge. In other words, what fraction of a full proton charge is the charge magnitude of the ion pair?
Problem- Enough of a monoprotic acid is dissolved in water to produce a 0.0174 M solution. The pH of the resulting solution is 2.48. Calculate the Ka for the acid.
At 760 K, 15% of a sample of cyclopropane changes to propene in 6.8 min. What is the half-life of cyclopropane at 760 K?
why should gloves be worn when handling white phosphorus - why are firefighters advised to use dry sand rather than wet sand to extinguish a small red phosphorus fire?
Problem- For each of the following gas-phase reactions, write the rate expression in terms of the appearance of each product or disappearance of each reactant. N2(g)+2H2(g)N2H4(g)
This means that the electronic ground state has two degenerate states. The first excited state also has two degenerate spin states, and is 121 cm-1 higher in energy than the ground state. a) Calculate the electronic partition function at 298 K
Use the van der Waals equation of state to plot the compressibility factor, Z, against P for methane at 180K and 250K. Hint: calculate Z as a function of V/n and P as a function of V/n, and then plot Z Vs. P.
a generic salt ab has a molar mass of 243 gmol and a solubility of 8.90 gl at 25 c what is the ksp of this
A standard NaOH solution is contaminated with Na2CO3. In the titration of 50.00 mL of .1002 M HCl solution, 32.00 and 32.50 mL of base are required to reach the methyl orange and Phenolpthalein end points,
Why is glycogen debranching enzyme necessary? a) It allows regulation of the rate of glycogenolysis. b) Because glycogen phosphorylase cannot convert G1P to G6P
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