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A photon having E = 46.9 keV energy scatters from a free electron inside a metal. What is the maximum energy the electron can gain from the photon
What is the wavelength of the most energetic photons produced by an X-ray tube using U = 24.3 kV potential difference
The temperature of the cosmic background radiation is measured to be 2.7 K. What is the wavelength of the peak in the spectral distribution at this temperature
From this statement alone, can you conclude that the solution is acidic? If not, what additional information would you need
Why does the tertiary amine -TRIETHYLAMINE have a much lower boiling point than 1-hexanamine, (its primary amine isomer)?
Which compounds reacted only with AgNo3 in ethanol. Why. Did any compounds appear not to react under either condition, even when heat was added ? Explain, for each compound, why it might not react b
Why does the nitrogen atom of NH2 (and not the nitrogen atom of the NH) group of phenyl hydrazine act as the nucleophilic site in the format ion of the phenylhydrazones.
oximes, phenylhydrazones and semicarbazones all belong to a family of compounds known as imines. what structural feature in these compounds makes this generalization valid
Why do the group 5A elements have relatively small electron affinities compared to the neighboring nonmetals in the corresponding rows
A chemist is commissioned to produce 50,000 liters of .550M aqueous phosphoric acid. The chemist can purchase solid, 98.64% pure, phosphoric acid to dissolve in water. How many grams of this reagent
A heat exchanger is used to transfer heat from a steam stream to a chlorine gas stream. 100 kg of steam at 1 bar and 400°C enters the heat exchanger and leaves the exchanger as saturated steam a
Why do acid- and base-catalyzed elimination reactions often result in a mixture of products? Be specific. Hint - there is more than one reason.
Another wood sample prepared from an object recovered at an archaeological excavation gives a decay rate of 0.177 disintegration per second per gram of the sample. What is the age of the object
The radioactive decay of Tl-206 to Pb-206 has a half-life of 4.20 min. Starting with 3.70 1022 atoms of Tl-206, calculate the number of such atoms left after 38.0 min.
The following pairs of solvents/solutions are not miscible. Which of the pair would sink to the bottom of the container?
If the partial pressure of H2S is 0.539 atm, calculate the total pressure (atm) of the mixture visualized. I wasn't able to put the actual visualization but I will provide to the best of my ability wh
Strontium-90 is one of the products of the fission of uranium-235. This strontium isotope is radioactive, with a half-life of 28.1 yr. Calculate how long it will take for 0.600 g of the isotope to b
How many peaks would you expect to see in the decoupled 13C spectrum of 4-chlorohept-1,6-diene?
The enthalpies of formation of oxalic acid in the solid and aqueous phases are -826.8 and -818.8 kJ/mol, respectively. The heat capacity of water is 4.184 J/g*K. Ignore the heat capacity of oxalic a
A stock solution of 1.24 x 10^-4 M dye is available in the lab. What volume of the stock solution must be transferred to a volumetric flask to prepare a 25.00 mL dilution with a concentration of 2.0
Calculate the pH of a buffer solution made by adding 10.0 g of anhydrous sodium acetate (NaC2H3O2) to 100mL of 0.100 M acetic acid (HC2H3O2).
A constant pressure calorimeter having a heat capacity of 74.2 kJ/K is used to measure the energy released from burning a compound in excess oxygen to form CO2(g) and H2O(l).
What is the concentration of the final solution obtained when 200.0 mL of a 0.00600-M solution of Red #40 dye is added to 400 mL of a 1.2 x 10^-2 solution of Red #40 dye to make a total volume of 60
Given that the specific heat capacities of ice and steam are 2.06 j/g degrees C and 2.03J/g degrees C, respectively, calculate the total quantity of heat evolved when 10.0 g of steam at 200 degrees