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A sample of pure NO2 is heated to 388C at which temperature it partially dissociates according to the equation:
2NO2(g)<->2NO(g)+O2(g)
At equilibrium the density of the gas mixture is 0.525 g/L at 0.755atm. calculate Kc for the reaction?
A solution contains 0.625 grams of CA 2+ in enough water to make 1880ml solution, what is the concentration in mEq per liter
If .050 moles of HA were dissolved in 1L of water, calculate the concentration of [HA], [H30+], and [A-] in the solution at equilibrium. What is the pH? Ka=7.94 x 10^-7, equivalence point ~ 9 mL, pH at equivalence ~ 9]
When light of frequency 6.88×1015 s-1 shines on the surface of a metal, electrons are ejected with a maximum kinetic energy of 3.40×10-19 J. Calculate the wavelength of this light.
When mixed with water, t-butylmethylether will be in which layer. Top Bottom Neither Both
What is the approximate value of the equilibrium constant, Kn, for the neutralization of hydrochloric acid with sodium hydroxide, shown in the equation below? HCL(aq) + NaOH(aq) --> H2O (l) + NaCl (aq)
it was necessary to measure the volume of the sample. The diameter of the cylinder was 23.0 mm and the length of the cylinder was 38.9 mm. What was the volume of the aluminum cylinder in cm3?
Calculate the theoretical yield of C2H5Cl. Calculate the percent yield of C2H5Cl if the reaction produced 176 g of C2H5Cl.
The forensic technician at a crime scene has just prepared a luminol stock solution by adding 16.0 of luminol into a total volume of 75.0 of .
How much heat is required to raise the temperature of a mole of oxygen from 298 to 3000 K at constant pressure
What is the formula that relates the temperature change obsereved in a substance with the energy released or abosrbed? when you measure a temperature rise during a chemical reaction, is the reaction endothermic or exothermic?
Calculate the pH of the solution after 10.0, 20.0, and 30.0 mL of acid have been added; pKb of (CH3)3N=4.19 at 25 degrees C
the mean activity coefficients for aqueous solutions of NaCl at 25C are given below. Confirm that an improved fit is obtained with the extended law
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