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To resolve an object in an electron microscope the wavelength of the electrons must be close to the diameter of the object. What kinetic energy must the electrons have in order to resolve a protein molecule that is 2.60 nm in diameter? Take the mass of an electron to be 9.11 x 10^-31 kg.
What is the wavelength of the photons emitted by hydrogen atoms when they undergo n=4 to n=2 transitions in nm?
When adding the solution of HNO3 from the buret in Step 14 to beaker 4, you know that you added 2.5 mL instead of 1.5 mL for a total volume of 11.0 mL. How would the calculated value of the equilibrium constant be affected for this sample?
Starting with a 5-carbon alcohol, a 6-carbon alcohol, and malonic ester, complete the synthesis and name the product(using the Malonic Ester Synthesis)
Calculate the volume of concentrated sulfuric acid, containing 98% H2SO4 by mass, that would contain 40.0 g of pure H2SO4.
Calculate (a) the mass percentage, (b) the mole fraction, (c) the molality, (d) the molarity of H2SO4 in this solution.
For a Voltaic Cell involving Pb as the anode and Ag as the cathode, what would be the initial voltage of the cell if the initial concentration of Pb2+ was 0.5M and Ag+ was 0.1M
Determine how many significant figures are there in the Fahrenheit result when 7.02C converted to Fahrenheit scale,?
How many ml of 2.00M H2SO4 are required to neutralize 50.0mL of 1.00M KOH?
Which molecule: water or ethanol is "more" polar? (By "more polar" I mean which molecule will have a larger net dipole moment
A mixture of neon and oxygen gases at a total pressure 975 mm Hg contains neon at a partial pressure of 325 mm Hg. If the gas mixture contains 3.75 grams of neon,
What is the molarity of the prepared naoh solution as determined in the titration? How many moles of OH are present when the end point is reached? What color should the solution appear at end point?
Calculating new pH, a). How many mL of each of 0.10M lactic acid solution and 0.10M NaOH solution are needed to make 800mL of a buffer of pH 3.50?
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