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The fluoride ion is more nucleophilic than the iodide anion indimethylsulfoxide. but, the fluoride anion is less nucleophilicthan the iodide anion in ethanol. Define why.
calculate w for the adiabatic expansion of 1 mol of an ideal gas at an initial pressure of 2.25 bar from and initial
What is the activation energy for a reaction if its rate constant is found to triple when the temperature is raised
An enzyme-catalyzed reaction produces a product that has a maximum absorbance at 412 nm. The extinction coefficient is 4000 M-1 cm-1. A 10/1 dilution of the enzyme is made and 20 mL of the dilution are put into a cuvette with 80 mL of water and 1...
Determine the pH of a 0.62 M NH4NO3 solution at 25°C. The Kb for NH3 is 1.76 × 10-5.
a spherical balloon containing 5.035 mg of hydrogen gas in its standard state of aggregation behaving ideally is
To be effective, intracellular signaling molecules must be inactivated/removed when their effects are no longer needed. Provide the methods by which this occurs for the following classes of intracellular messengers
Every student recorded the temperature change and computed the enthalpy of neutralization. Classify the student who observes a temperature change that will be different from that observed by the other two chemists. Explain why is the temperature d..
The same apparatus is them filled with an unknown gas at 32.3 C to a pressure of 645 mm Hg. It takes 5 hours 34 minutes and 25 seconds for the pressure to fall to 207 mm Hg. Calculate the molar mass of the unknown gas.
As air flows across the cooling coil of an air conditioner at the rate of 3856 kg/hr, its temperature drops from 26*C to 12*C. Determine the internal energy change in kJ/hr.
A 2.95 -g sample of an unknown chlorofluorocarbon is decomposed and produces 585ml of chlorine gas at a pressure of 748 mmHg and a temperature of 298K.
Propose a structure for an amine of formula C4H9N, which liberates a gas when treated with NaNO2 and HCl. The 13C NMR spectrum is as follows, with attached protons in parentheses
If 37.0 mL lead(II) nitrate solution reacts completely with excess sodium iodide solution to yield 0.700 g precipitate, what is the molarity of lead(II) ion in the original solution?
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