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Applying quantum mechanics to a large molecule, say,hexamethylchicken wire, begins with building theHamiltonian. The larger the molecule, the more terms there will be, of course, but they all fit th
The initial temperature of the water and calorimeter is 16°C, and the final temperature after equilibrium is established is 38° C. When the calorimeter and its contents are weighed, 1.2 g of
It has been replaced by quantummechanics but, by a remarkable coincidence (not the only one wherethe Coulomb potential is concerned), the energies it predicts agreeexactly with those obtained from t
Each of two small spheres is positively charged; the combined charge totals 60.0 nC. What is the charge on each sphere if the spheres are repelled with a force of magnitude 0.270 mN when placed 0.10
One suggested design would use a battery of 10 fluidized beds, each 20m long, 4m wide, & containing solids to the depth of 1m.Findthe rate of reaction within the beds , based on oxygenused.
A car moving with constant acceleration covered the distance between two points 60 m apart in 6 s. its speed as it passes the second point was 15 m/s what is the speed at the first point? What was t
A car makes a trip due north for three-fourths of the time and due south one-fourth of the time. The average northward velocity has a magnitude of 45 m/s, and the average southward velocity has a ma
Consider the hypothetical reaction, A + B ® C, with the rate law, Rate =k[A]2[B]. If the concentration of A is increased by afactor of 4 and the concentration of B is increased by a factor of2,
A tourist being chased by an angry bear is running in a straight line toward his car at a speed of 3.33 m/s. The car is a distance d away. The bear is 28.8 m behind the tourist and running at 4.36 m
An aqueous solution of 0.150 g of the enzyme lysozymedissolved in 210 ml of solution has an osmotic pressure of 0.953torr at 25 oC. Calculate the molar mass oflysozyme.
A typical automobile under hard braking loses speed at a rate of about 6.4 m/s2; the typical reaction time to engage the brakes is 0.48 s. A local school board sets the speed limit in a school zone
A rabbit runs in a straight line with a velocity of +1.6 m/s for a period of time, rests for 9 s, and then runs again along the same line at +0.55 m/s for an unknown amount of time. The rabbit trav
The activation energy for the diffusion of atomic species A inmetal B is 125 kJ/mol. Calculate the diffusion coefficient at823°C, given that the value of D at 1200°C is 8.3× 10-12 m2/
(a) how much farther west does the blue boat travel, compared to the green boat, and (b) how much farther south does the green boat travel, compared to the blue boat? Express your answers in km.
Three particles are fixed on an x axis. Particle 1 of charge q1 is at x = -a and particle 2 of charge q2 is at x = +a. If their net electrostatic force on particle 3 of charge Q is to be zero, what
Calcium carbonate, the major component of limestone, isslightly soluble in water. Write an equilibrium equation showing the slight solubility of calcium carbonate in water.
A metal bar 122 mm long and having a square cross section with an edge length of 17 mm is pulled in tension with a load of 65000 N, which produces an elongation of 0.12 mm.
A longitudinal standing wave is established in a tube open at one end only. In air, the fundamental frequency is 110 Hz. What is the frequency of the 3rd harmonic when helium fills the tube? Take th
How much farther south does the green boat travel, compared to the blue boat? Express your answers in km.
Explain why the pKa value of p-aminophenol is higher than that of p-nitrophenol. Would you expect the pKa value of m-aminophenol to be higher or lower than the pKa of p-aminophenol?
Consider a solution of ethanol, C2H5OH, and water in which the mole fraction of ethanol is 0.0820. The density of the solution is 0.978 g/mL. Calculate the molality, molarity and percent by mass of
Consider two spheres with two masses and two charges. At a distance of 119.0 m, the ratio of the electric force to the gravitational force is f. As a multiple of f, what is the ratio between the for
A pharmaceutical preparation made with ethanol (c2h5oh) iscontaminated with methanol (ch3oh). a sample of vapor above theliquid mixture contains 97/1 mass ratio of c2h5oh to ch3oh.
In this same time, what is the vertical displacement of the electron? Treat up as positive.
In order to use this for chemical species that often have Avogadro's number of particles present, we employ Stirling's Approximation. Stirling's Approximation is useful for large numbers on the orde