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Gamma rays are high-energy photons. In a certain nuclear reaction, a γ-ray of energy 0.574 MeV is produced. What's the frequency of such a photon.
A solution which contains 41.0 g of an unknown molecular compound in 312 g of water freezes at -2.23°C. What is the molar mass of the unknown?
How much heat is required to raise the temperature of 5.5 x 10^2 g of aluminum by 10°C?
Suggest a reasonable strategy for the synthesis of 1-bromo-2-methylcyclohexane from methylcyclohexane
The rate-determining step of the bromination of acetone engages breaking a carbon-hydrogen bond. Approximate the ratio of the rate constants Kc-h/Kc-d for the reaction at 300K.
The solution diluted in half by water (1 mL of X and 1 mL of H2O) has an absorbance at 425 nm of 0.8 and a molar extinction coefficient of 1.5 ? 103 M-1 cm-1. What is the molar concentration of the original solution of X? (1 cm cuvette)
Discuss how one could tell the difference between first order, second order and zero order reactions by graphing the reactant concentration in some way vs time.
A compound gave an orange precipitate when reacted with 2,4 -DNP and showed a strong absorbance. The Tollens test shows a negative result
how do you go from a five membered ring diester to a six member edring fenchone? what steps do you need to
Titanium (f=6.94 x 10^-19 J) and silicon(f=7.77 x 10^-19 J) surfaces are irradiated with UV radiationwith a wavelength of 205 nm. What is the wavelength (nm) of the electrons emitted by the titanium surface
Explain what atomic species is being reduced. Gold miners then reacts the basic aqueous product solution with Zn dust to recover the gold metal. State a balanced redox reaction for the recovery process with zinc.
At what point during a titration of a weak acid with a strong base does the pH = pKa? What ratio would cause pH pKa & pH pKa
Which of the following two compounds, anisole or toluene, would have a larger Rf value using silica gel plates and methylene chloride as the developing solvent and why
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