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Calculate the most probable speed of an ozone molecule in the stratosphere, where the temperature is 270 K
effects of solvent water on the photophysical properties of a series of meta- and para-substituted anilines have been
A solution of NAOCH3 in methanol can be prepared by adding NaH to methanol (CH3OH). A flammable gas is produced as a byproduct. a) write the acid-base reaction that takes place
at a temperature of 25 degree celsius and a pressure of 757 mm hg the product gas h2 is collected over h2othen
what region of the two phase system was the nylon-6,10 polymer formed after the sebacoyl chloride/cyclohexane
A cylinder contains 250 g of Helium at 200 K. The external pressure is constant at 1 atm. There is an increase in temperature of 56 K. Calculate the heat lost or gained by the system in response to this change in the external temperature.
Draw all of the resonance forms of 4-nitrobenzaldehyde which contribute to the enhanced electrophilicity of the aldehyde carbon relative to benzaldehyde
Titanium (w=6.94x10^-19J) and silicon (w=7.77x10^-19J) surfaces are irradiated with UV radiation with a wavelength of 217nm. What is the wavelength of the electrons emitted by the titanium surface
Calculate the pH during the titration of 20.0mL of 0.27 M Propanoic Acid (HPr) with 28.0mL of 0.32 M NaOH. Ka=1.34 x 10^-5.
Use line notation to represent the electrochemical cells for each of the following overall redox reactions. Part A: Ni2+(aq)+Mg(s) Ni(s)+Mg2+(aq)
Hydroxylapatite, Ca10(PO4)6(OH)2, has a solubility constant of Ksp = 2.34 × 10-59. Solid hydroxylapatite is dissolved in water to form a saturated solution. What is the concentration of Ca2 in this solution if [OH-] is somehow fixed at 5.30 × 10-6..
Calculate the solubility product (Ksp) for silver bromide if the concentration of the silver ion is 0.770 M and of the bromide ion is 0.770 M.
The Calfhead stream (flow rate 0.05m3s-1) discharges into the Oxhead river (flow of 3.00 m3.s-1). It is proposed to discharge waste into the Calfhead stream but the EPA requires a stream mixing study be undertaken.
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