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The electron microscope has been widely utilized to obtain highly magnified images of biological as well as other types of materials. Explain when an electron is accelerated through a particular potential field, it attains a speed of 3.20 x106 m/s. Explain the mass of the electron is 9.11 x10-31kg. Planck's constant has the value h = 6.63 x10-34 J-s. Define what is the characteristic wavelength of this electron?
a) Explain the wavelength of this electron is 2.27e-13 meters.b) Define the wavelength of this electron is 4.26e-08meters.c) Define the wavelength of this electron is 93.7 meters.d) Define the wavelength of this electron is 2.27e-10 meters.e) Define the wavelength of this electron is 6.82e-05 meters.
If it took 14.4 ml of KMnO4 to titrate a solution that contained .6504 g of KMnO4 and 1.0012 g of an iron containing unknown substance What is the molarity of the KMnO4, moles of MnO4- and Fe2+ and the mass of the Fe2+
hydrogen gas is collected over water at 21 degrees C and an atmospheric pressure of 748 mm Hg. what is the partial pressure of hydrogen gas in the mixture
many drugs decompose in blood by a first-order process. in 8.0 hr secobarbital sodium a common sedative reaches a blood
For each of the reactions, calculate the mass (in grams) of the product formed when 3.51g of the underlined reactant completely reacts. Assume that there is more than enough of the other reactant.
typically scuba tanks are immersed in water to cool them as they are filled with compressed air. if a tank is initially
Calculate the pressure and composition of air 100 miles above the surface of the earth assuming that the atmosphere has a temperature of 0 celsius independent of altitude. The correct answer is 3.27 X 10^-9 bar; yO2=0.015, yN2=0.985 but I don't kn..
What are the products of reaction of methyl benzoate, benzoic acid, benzaldehyde, and benzophenone with an excess of a Grignard reagent, RMgBr?
Consider an electron moving from an n = 2 orbital to an n = 1 orbital. For this to occur, will the atom need to absorb energy or dissipate energy by releasing a photon of electromagnetic radiation. Is the n = 2 orbital more or less stable than the..
Consider a solution that contains 81.0% R isomer and 19.0% S isomer. If the observed specific rotation of the mixture is -64.0°, what is the specific rotation of the pure R isomer
Gaseous oxygen is held in two separate containers at identical temperature and pressure. The volume of container A is 6.48 L and it contains 0.785 mol of the gas. The volume of container B id 5.78 L. How many moles of the gas are in container B
What is so good about supercritical CO2? Wouldnt its widespread use contribute to climate change?
The other plate was placed in a chamber containing hexane, and after developed it showed two spots, one with an Rf value of 0.54 and one with an Rf value of 0.37. Explain how this occurred
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