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Discuss how long will it take the concentration of A to drop from the 0.75 M to0.25 M when the rate constant for the reaction 3A ® 4B is 6.00 ´10 -3 L mol -1min
Estimate the first-order rate constant for its decay, in units of years -1 when the Carbon-14 is a radioactive isotope which decays with a half-life of 5730 years.
In what two ways might the presence of significant amounts of benzoic acid impurity be harmful to the benzoic condensation if the Benzaldehyde is easily oxidized to benzoic acid by oxygen
A thermos is a container with vacuum among its inner and outer walls. Describe why removing air among the walls reduces the heat exchange between the contents of the thermos and surroundings.
By mixing the 2.17g of an unknown non-electrolyte a solution is prepared with the 225.0g of chloroform. The freezing point of the mixture is -64.1g Celsius, while the freezing point of chloroform i
Discuss is the compound an electrolyte or not? If it is an electrolyte, determine the numbers of ions does the compound produce? Where the value of R = 0.0821Latm/oC-mol.
Explain what mass of it is required to lower the melting point of 5.2 kg of ice to -4.2 degrees Celsius, assuming that NaCl dissolves totally and produces an ideal solution,?
Find out the approximate normal boiling temperature of the same solution when a certain aqueous solution freezes at the -.0300oC and where the value of Kf = 1.86oC/m and Kb = 0.51 oC/m
Write down the empirical formulas of compounds that the elements in the third period are expected to produce with the
Determine the mass of water vapor present in a room of volume 400 m3 that contains air at 27 degrees C on a day when the relative humidity is 60 percent.
Describe what property of the sodium salt of methyl salicylate, as compared to the disodium salt of salicylic acid, made it possible to visually gauge the progress of this basic hydrolysis of methy
Determine the probability that a particle will be found among the 0.40L and 0.45L in a box of length L for: When the particle in the first excited state (n=2);
Determine the most likely locations of a particle in a box of length L in the state n=5? Solve this problem graphically with properly labeled axes, and fully explain your answer.
Determine the expectation value for the momentum <p> for the ground state (n=1) wave function of the particle in a box. Discuss the physical meaning of this result. Explain does the result ch
4.48 L of oxygen are collected at STP in 1.5 minutes (remember that the molar volume of a gas at STP is 22.4 L/moles). Determine the average reaction rate in this time frame in moles per minute.
A aliquot which is having 25.0 mL of an aqueous quinine solution was diluted to 50.0 mL and found to have an absorbance of the 0.656 at 348 nm when calculated in a 2.50-cm cell.
Determine the probability of locating an electron in a one-dimensional box of length 5.00 nm and nx=10 among the .167 and 5.000 nm? Assume the wave function is constant over this range.
Calculate the pH of a solution made by dissolving the 0.123 g of ammonium chloride in sufficient water to make 500 mL of solution; Ka= 5.70 × 10-10.
An aqueous sample which is having 15.00-mL, was analyzed for its nitrite content by reaction with the 40.13 mL of 0.04013 N acidified potassium permanganate solution, liberating nitrate ion.
Explain how would you make 70mL if a 1:10 dilution? Explain how would you make the 40mL of a 1:20 dilution of 1M NaCl solution?
Calculate which of the following is paramagnetic, explain your choice, and determine its magnetic moment:
The complexes [Mn(H2O)6]2+, [Fe(H2O06]3+, [MnCl4]2-, and [FeCl4]-all have magnetic moments of nearly 5.92 BM. Discuss what does this tell you about the geometries and electronic structures of these
Determine the approximate percent ionization of a 0.1 M aqueous HCN solution which also contains the 0.1 M CN¨C; Ka = 6.2¡Á 10¨C10. Explain in detail.
Determine the vibration frequency, in cm-1, needed to increase the energy of a hydrogen fluoride molecule from the v=5to the v=6 energy level?
Determine the pH of the solution that results from mixing the 15mlof a strong acid solution, pH = 3.0, with 10ml of a strong base solution, pH 7.2.