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Question- What is the resolution of an electron microscope? What is the typical energy, velocity, momentum, and de Broglie wavelength of electrons typically used in the microscope?
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In addition to continuous radiation, fluorescent lamps emit sharp lines in the visible region from a mercury discharge within the tube. Much of this light has a wavelength of 436 nm. What is the energy (in J) of one photon of this light
how many grams of water can be cooled from 43c to 22c by the evaporation of 60 g of water? the heat of vaporization
a solution of sodium chloride in water has a vapor pressure of 20.1 torr at 25degc. what is the mole fraction of nacl
Although the use of absorbances at 450 nm provided you with maximum sensitivity, the absorbaces at, say, 400 nm or 500 nm are not zero and could have been used throughout this experiment. would the same value of K be obtained at one of these wavel..
ethanol reacts with tosylate/nucleophile and the following: Hydroxide, cyanide, bromide, sodium propoxide and ammonia. What are the products from each
Ethane C2H6 undergoes combustion according the following chemical equation: C2H6(l) + 7/2O2(g) ---> 2Co2(g) + 3H2O(l). Calculate delta H knot for this reaction. 1. -1560 kJ/mol 2. -11.230 kJ/mol 3. 22,040 kJ/mol 4. -420 kJ/mol 5. 420 kJ/mol
What is the conjuate base of HPO4^2- C. Which acid has the weaker conjugate base. D. which acid has the stronger conjuate base. E. which acid produces more ions
Calculate the conditional formation constant Kf for the formation of an EDTA complex with copper (II) at a pH of 5.00, if log Kf= 18.80
Define what is the reaction mechanism for the conversion of 9-fluorenone to 9-fluorenol via sodium borohydride as well as aqueous acid reduction. Illustrate using curved arrows to show the flow of electrons.
the addition of anhydrous calcium chloride to the crude product obtained from the separation procedure often results in
It required 105 s for 1.0 L of the gas to effuse. Under identical experimental conditions it required 31 s for 1.0 L of O2 gas to effuse. Calculate the molar mass of the unknown gas.
Consider the subsequent reaction at equilibrium. Explain what effect will increasing the pressure of the reaction mixture have on the system. 2 H2S(g) + 3 O2(g) ? 2 H2O(g) + 2 SO2(g)
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