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A first-order reaction has rate constants of 4.6x10^-2s^-1 and 8.1x10^-2s^-1 at 0 degrees and 20 degrees C, respectively. What is the value of the activation energy?
Identify the group of elements that corresponds to the following generalized electron configuration: [noble gas]ns^2(n-2)f^6?
A buffer is created by combining 3.65 of with 4.72 of and diluting to a total volume of 700.0 . Determine the pH
How does a base, such as NaOH, help to catalyze the benzoin condensation when thiamine is present
A 500ml Buffer solutin is 0.150 M in HNO2 and 0.175 M in KNO2. The Ka for HNO2 is 4.6*10^-4. What is the inital pH of this buffer. What is the pH of the buffer in the question above if 0.0049 moles of HCl are added assuming no change in volume
What is the silver ion concentration in a solution prepared by mixing 357 mL of 0.392 M silver nitrate with 469 mL of 0.504 M sodium phosphate?
This is a fact that Bromine(Br) is larger than chlorine(Cl) but indication of equilibrium constant suggests that a bromo substituent has a less preference for the equatorial position than chloro substituent? Explain it briefly?
what is the amount of hydrogen in g in the sample? Vapor pressure of water at 20 degrees celsius is 17.5 torr.
Copper is electroplated from CuSO4 solution. A constant current of 10.0 amps is applied by an external power supply for exactly 75.0 minutes. How many grams of copper can be plated out during this time interval
Based on the amounts of reagents specified in this experiment, calculate the theorectical yield of asprin (180g/mol) in terms of moles and grams.
How many mole of hydrogen gas can be liberated from 85.5 moles of magnesium hydride if the process operates at 80% efficiency
Dissolving 3g of an impure sample of CaCO3 in HCl produces .656 L of CO2, measured at 293 K and 1.04 atm. What is the percent by mass of the CaCO3 in the sample?
Is it possible to prepare a buffer using HNO2? What is the expected pH range. Why is it seldom used to prepare buffer solutions
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