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In an electron microscope the electrons generate the image. For one of the scanning electron microscopes in our Central Analytical Facility, the electrons are accelerated to have a kinetic energy of 200,000eV. Electrons with this kinetic energy have a velocity of 2.67 x10^8 m/s, almost 90% of the speed of light. What is the wavelength of the electrons traveling at this very high speed?
A sample of nitrogen gas in a 4.5-L container at a temperature of 27 C exerts a pressure of 4.1 atm. Calculate the number of moles of gas in the sample
The temperature of a block of copper metal (molar mass 63.55 g mol-1) fell by 8.52 K when the copper block released 64.5 J of heat. What is the mass of the copper block?
Explain how this reaction at equilibrium responds to the addition of heat? Please include any logic for why the reaction is endothermic or exothermic,
consider the following energy diagram for an enzyme-catalyzed reaction. which step is probably the slowest? chose from the following answer.
Determine the quantity of stock 75% EtOH required to prepare 300ml of a 25% EtOH solution.
Lethality of Carbon Monoxide, Sulfur Dioxide and TNT, Air monitoring provides the following contaminant concentrations at the approximate center of a fire scene in which acres of automobile tires are burning
Suppose that microwave radiation has a wavelength of 11.2cm. How many protons are required to heat 245mL of Coffee from 25.0 C to 62.0C? Assume that the coffee has the same density,
The element M forms the chloride MCl4 containing 75.0% Cl by mass. What is the atomic weight of M?
Calculate the pH when 6.80 g of NaBrO is added to 100. mL of a 0.500M HBrO solution (assume no change in volume). 8.76 b) Calculate the pH when 100 mL of 0.50 M NaOH is added to 100 mL of a 0.50M HBrO solution. 11.0
A gaseous mixture of O2 and Kr has a density of 1.140 g/L at 415 torr and 300. K. What is the mole percent O2 in the mixture?
what type of salt does copper oxide produce?
The process is mechanically irreversible, requiring 20% more work than the mechanically reversible compression and the sorroundings consist of a heat reservoir at 27 degrees C?
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