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Discuss how much 0.100 M NaOH must be added to 45.0 mL of 0.100 M HOAc (ka for acetic acid = 1.8x10-5) to give a solution whose pH is 4.30?
Determine the concentration of sodium acetate [Na(CH3COO)] formed at the equivalence point when 25.0mL of 0.0750 M acetic acid (CH3COOH) are titrated with0.0300 M NaOH.
Blue Light of wavelength 450 nm passes via an interference grating having a slit spacing of 0.001mm and makes an interference pattern on the wall. Determine how many bright fringes will be seen?
Write down all the equilibrium expressions for all the steps of this dissociation. Determine the pH and the concentration of H2PO4^- , HPO4 ^-2 and PO4^3- ions for a 9.0M H3PO4 solution.
Determine the steady-state temperature distribution in a spherical shell of inner radius 1 and outer radius 2 when the inner surface is held at 0 degrees and the outer surface has its upper half at
conducting rod of 1.2 m pivoted at the end is rotating at constant frequency 25Hz. When the magnetic field is 0.125T determine the electromotive force induced between the ends of the rods?
Determine the final temperature observed in a coffee cup calorimeter when the 12.50g of calcium hydroxide is totally dissolved in the 125.0g of water initially at the 21.5o C.
2(exponent 3t) - 5 * 2(exponent 2t) + 2 * 2(exponent t) + 8 = 0. Verify that t = 2 is the solution to equation. Consider p(x) = x^3 - 5x^2 + 2x + 8 = 0 What part (a) tells about factors of p(x)?
When one more of H2O(g) is condensed to one mole of H2O(l) at 1.00 atm and100.oC, 40.66 kJ of heat is released. One mole of H2O (g) at 1.00 atm and 100.oC occupies a volume of 30.6L.
A laser beam is incident on the two slits having a separation of 0.220 mm, and a screen is positioned 4.80 m from the slits. When the bright interference fringes on the screen are separated by 1.61
At STP a balloon filled with the 1.00 mole of helium gas is heated to 298 K at the constant pressure. Determine the change in the internal energy. (cHe= 5.20 J/g
A uniform beam of 1220 N is joined to a vertical wall at one end and is supported through a cable at the end. A 1960 N crate suspends from the far end of the beam. By using the data, determine: i)
Determine the heat change when a system consisting of a 5.50kg iron ball at the 37.0 degree C. is placed in a large reservoir of water at17 degree C.
Nickel consist of an fcc crystal structure. When the Ni atoms at the center of the faces of the cubic cell are replaced by Al atoms, an ordered alloy is obtained. Find out the composition of the all
What would be the product of the reaction by using the solubility rules, would you expect there to be a reaction between NaCl and CaCl2?
When a TV set were laid on its back, what potential difference, acting over a distance of 15 cm, would be required to balance the downward force of gravity so that an electron would remain stationar
Determine the minimum amount of heat that must be dissipated to the environment when one ton of air is separated into the nitrogen (21% by mole) and oxygen (79% by mole).
The department store finds twice as many customers purchase two units of $3.95 (for the pair) as purchase one unit for $2.15. Find expected purchase price per unit?
The corresponding third-law standard entropies are 69.95J/mol and 188.835 J/mol at the same temperature. The standard enthalpies of formation (at 298K) of liquid and gaseous phases of water are -241
Would both rings have approximately the same value? Fully explain your reasons. Which ring, cyclopentene or cyclobutene, would you expect to have the greatest heat of hydrogenation per m
A uniform electric field having magnitude 370 N/C pointing in the positive x-direction acts on the electron, that is initially at rest. The electron has moved 3.00 cm. (i) Determine the work done by
Determine the wavelength of the light emitted when a hydrogen atom electron returns to the n=1 level from n= 5? ( first determine the energy difference)
If its population is disovered to be at the certain level at 10 pm on same day, then at what time was its population at the third of that level?
Determine the partition function of the electronic states at 2000 K. Determine the relative population of each level at 2000K. A certain atom has a triply degenerated ground level, anon-degenerated
The double-slit interference experiment represents fringes on a screen. The whole experiment is then immersed into the water. Do the fringes on the screen get closer altogether, farther apart, remai