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1. What happens to the value of the equilibrium constant for a reaction if the reaction equation is reversed? Multiplied by a constant?
2. What is the effect of a change in volume on a chemical reaction (that includes gaseous reactants or products) initially at equilibrium?
3. What is the effect of a temperature change on a chemical reaction initially at equilibrium? How does the effect differ for an exothermic reaction compared to an endothermic one?
In the first step of the synthesis of PABA, why was it necessary to add sodium acetate to have reaction of p-toluidine with acetic anhydride?
115 grams of KCl is dissolved in 750mL of water (assume density=1.005g/mL). What are the molality, molarity, mole fraction, mole percent, % mass, ppm by mass
Explain In the reaction of hydrogen peroxide with iron (II) ion in acidic solution to form iron (III) ion and water, Explain what is the oxidizing agent
The sudden opening of the epiglottis and vocal cords releases this air explosively. Just prior to this release, what is the approximate pressure of the gas inside the lungs?
When the mixture is ignited, gases are produced and 815 J of energy is released. To what volume will the gases expand against a constant pressure of 635 mmHg, if all the energy released is converted to work to push the piston?
Ballon filled with 500.0 mL of helium at atemp of 27 degrees C and 755 mmHg. As the ballon risesin the atmosphere , the temp & pressure drop. What volume will it have when it reaches an altitude where the temp is - 33 degrees celcius and the press..
use the measure "mass of 10.00mL" which is 10.574g, to calculate the density of mass NaCl which is 5.923g
If the pressure exerted by ozone, O3, in the stratosphere is 3.0 times 10^- 3 atm and the temperature is 254 K, how many ozone molecules are in a liter?
stock soultions of thris base and tris acid how much of each would you use to make 100ml
The minimum energy needed to eject an electron from a sodium atom is 4.41 X 10^-19. What is the maximum wavelength of light, in nanometers, that will show a photoelectric effect with sodium?
What is the equilibrium constant Kc for the reaction below. Assume temperature is 25oC. (Hint, Represent the reaction below as a sum of reactions and then combine the corresponding K values to obtain Kc for the reaction below.) HF(aq) +NH3(aq) N..
Problem- Using the concept of effective nuclear charge and sheilding, explain why alkali metals have relatively low first ionization energies
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