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Problem- The -ray photons emitted by the nuclear decay of a technetium-99 atom used in radiopharmaceuticals have an energy of 140.511 keV. Calculate the wavelength of these -rays.
I want you to clarify the chemistry in this above problem.
A generic salt, AB, has a molar mass of 189 g/mol and a solubility of 6.10 g/L at 25 C what is the Ksp of this salt
What is the energy in joules released by the fission of a single uranium-235 atom?
Two 26.0 ml samples, one 0.100 M HCl and the other 0.100 M HF, were titrated with 0.200 M KOH. What is the volume of added base at the equivalence point for HCl. What is the volume of added base at the equivalence point for HF
when 2-phenyl-2-butene was treated with h2so4 and h2o a compound with molecular formula c20h24 was isolated as a side
FireFlies flash at a rate that depends on temperature. At 29 C the average rate is 3.3 flashes every 10 seconds;at 23 C the average rate falls to 2.7 flashes every 10 seconds.
Indicate whether the solubility of carbon dioxide gas in water increases or decreases for each of the following. 1.) The temperature of the solution increases
Why would you put a metal sample in a test tube and then in boiling water to heat it instead of putting the metal sample directly in the boiling water
What volume of carbon dioxide gas will be produced at 25 degrees Celcius and 590 mmHg, when 65.0 mL of 0.200 M HCl is treated with excess sodium bicarbonate?
Show the chemical equation of chloroform and a base such as potassium t-butoxide or sodium hydroxide dissolved in water to make a dichlorocarbene and other products.
What would be an appropriate reaction mechanism for these two reactions? Including electron transfer arrows.
when 1.50 l of 1.00 m na2so4 solution at 30.0 degrees celcuis is added to 1.50 l of 1.00 m bano32 solution at 30.0
water can be expressed in polynomial form, vs the number of moles of ethanol (nEtOH), as 1002.93+54.6664*nEthOH-0.36394*nEthOH^2+0.028256*nEtOH^3, the partial molar volume of ethanol has its minimum value at m > 0.004 mol/kg.
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