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A reaction has a rate constant of 1.21×10-4 at 25 degrees C and 0.232 at 79 degrees C. The activation barrier for the reaction is 122 KJ/mol. What is the value of the rate constant at 18 degrees C?
If the average human body discharges 925.0g CO2 per day, how many moles of NaOHare needed each day for each person in the spacecraft?( 42.04 mol NaOH)
of 3M sodium acetate and water would you use to make 10ml of a 0.25M solution of sodium acetate? Show the calculations.
The standard free energy change for the reaction of nitrogen gas with hydrogen gas to produce ammonia is -32.9 kJ. Calculate the equilibrium constant for this reaction at 25°C.
how many grams of pbcl2nbspwill be produced if excess hcl is added to 30.00 ml of a 0.2319m solution of
Determine the end (final) value of n in a hydrogen atom transition, if the electron starts in n = 4 and the atom emits a photon of light with a wavelength of 486 nm.
Which of the following pairs of molecules is listed in order of decreasing net dipole moment (from more polar molecule to less polar molecule)
Why is the Hydrogen atom of the -OH group on a carboxylic acid the most acidic hydrogen (the only H that can be removed by a base) in this type of molecule>
1 compute the ph at the temperature of 25 0c of a solution prepared by mixingnbsp 50 ml of 1.60 m sodium hydroxide
A saline solution used in intravenous drips for patients who cannot take oral fluids contains 0.92% (w/v) NaCl in water. How many grams of NaCl are contained in 729 mL of this solution.
When an aqueous solution of sodium sulfite is added to an aqueous solution of hydrobromic acid, a gas evolves. Write the balanced chemical equation
Determine the pH at the equivalence (stoichiometric) point in the titration of 30.9 mL of 0.804 M HCOOH by 0.369 M LiOH. The Ka of HCOOH is 1.8 x 10-4.
what is the density of the block? How to approach the problem The apparent mass of the object in the fluid, 5.6 , is equal to its mass in air, 50.0 , minus the mass of the displaced fluid
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