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Wood and oxygen are two reagents required to keep a campfire burning. identify the limiting and excess reagent: a) The fire dwindles over time. b) A carbon dioxide fire extinguisher puts out the flame.
you store the buffer in the fridge overnight (4 degrees). Calculate the pH of the buffer when you take it out of the fridge the following morning.
The cell potential of the following electrochemical cell depends on the gold concentration in the cathode half-cell:
In a simplified and example version of the solar system model (developed by Neils Bohr, a Danish chemist), an electron in the first orbit has an energy of 2 J
The chemical mechanism of the reaction involves transfer of phosphoryl group to the enzyme, forming a phospho-enzyme intermediate: a His residue is phosphorylated, and H2O hydrolyzes the P enzyme intermediate. Determine the type of mechanism
Compute the heat amount required to heat a 3.9kg gold bar from 28 degree Celsius to 68 degree Celsius. Given Specific heat capacity of gold = 0.128 J/g°C.
What is the pH of the solution? The K of hypochlorous acid is 3.8*10-8. Please explain how to get this using the Henderson-Hassalbach Equation.
Write a mechanism for the reaction of an alkyl halide with alcoholic silver nitrate which demonstrates the type of substituition which occurs. Explain how this mechanism accounts for the relative rate of reactivity for 1 degree, 2 degree and 3 deg..
A11.6 g sample of a certain gas was introduced into a constant volume container at 25 °C. if the container were heated to 175 °C, how many grams of gas must be vented from the container to keep the pressure of the gas constant
What is the pH of 270.0 mL of an aqueous solution containing 0.525 g of the strong acid trifluoromethane sulfonic acid (CF3SO3H)?
An X-ray photon of wavelength 0.976 strikes a surface. The emitted electron has a kinetic energy of 958 eV. What is the binding energy of the electron in?
A large positive overall voltage from redox, metabolic step means: a. the process is very non-spontaneous b. change of G is large and positive
How many moles of gas are contained in a human breath that occupies 0.45 L and has pressure of 747
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