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(a) Why does the Bohr model of the hydrogen atom violate the uncertainty principle?
(b) In what way is the description of the electron using a wave function consistent with de Broglie's hypothesis?
(c) What is meant by the term probability density? Given the wave function, how do we find the probability density at a certain point in space?
why is a solution containing dissolved brass made basic with concentrated NH3 and again with acidified CH3COOH?
when 0.060 mol of propionic acid c2h5co2h is dissolved in 500 ml of water the equilibrium concentration of h3o ions is
What is the pH at the stoichiometric point (end point) for the titration of 50 ml of 0.20 M methyl amine CH3NH2 (aq) with 0.20 M perchloric acid HClO4(aq). For methyl amine (CH3NH2), Kb = 3.6 x 10^-4.
Calculate the molar concentration for each of the following solutions. 1.) 4.00g KCl in 70.0mL of solution 2.) 4.00g NaCrO4 in 70.0mL of solution
europium europium is a chemical element with the symbol eu and atomic number 63 crystallizes in a body-centered cubic
A mixture contains H2 at 325torr pressure, N2 at 475torr pressure, and O2 at 650torr pressure. What is the total pressure of the gases in the system
The solubility product constant at 25 C for AgI(s) in water has the value 8.3x 10-17. Calculate Delta G rxn at 25 C for the process AgI (s) --> Ag+ (aq) + I- (aq) where (Ag+)= 9.1 x 10 -9 and (I) = 9.1x10-9
Calculate the volume of hexane that you need at minimum, if you want to extract at least 95% of the total 1,2,4-TCB present in the water sample
A gaseous compound containing hydrogen and carbon is decomposed and found to contain 85.63% C and 14.37% H by mass. The mass of 258 mL of the gas, measured at STP, is found to be 0.646 g. What is the molecular formula of the compound?
A buffer solution with a pH reading a 8.50 was prepared by mixing 0.25 mole acid (HA) and 0.05 mile NaOH in 500.0mL DI water. How much more gram of NaOH you should add to this solution in order to have the highest buffer capacity of this solution
Compute the equilibrium concentration of La3+ in the resulting solution. Ignore activity coefficients. Ksp = 1.0 x 10-11 use the below equation to find the net ionic equation. KIO3(aq) + La(NO3)3(aq) ---> La(IO3)3(s) + KNO3(aq)
For the cell reaction, Cu^2+(aq) + Zn(s) (arrow) Cu(s) + Zn^2+(aq), E^* cell = 1.10V. Use the Nernst equation to determine E cell when the molar concentrations of Zn^2 and Cu^2+ are 1.0 M and 1.0 x10^-7 M, respectively.
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