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How many minutes would a solution of Cd2+ have to be electrolyzed with a 2.420 A current to plate out 1.77 g of Cd? min
Determine the pH of each of the following solutions. (a) 0.399 M benzoic acid (weak acid with Ka = 6.3e-05). (b) 0.558 M boric acid (weak acid with Ka = 5.8e-10). (c) 0.171 M pyridine (weak base with Kb = 1.7e-09).
Use average bond energies to calculate the energy released when 1 mole of acetylene gas (ethyne, C2H2) reacts completely with O2(g) to form gaseous products. Use the information in the Table of Bond Enthalpies which is in the Chemistry Tables link..
Explain why viruses, in physiologic conditions, are capable of packing extremely large amounts of DNA (negatively charged) into their tiny capsids.
What is the absolute error in pKa according to pKa from the mid-point pH value? The true value is given in # (5) (9) What is the relative % error in pKa according to pKa from the mid-point pH value?
Match the quantum numbers with the corresponding shell and subshell or invalid if the quantum numbers are not a valid set.
What is the minimum mass of ethylene glycol (C2H6O2) that must be dissolved in 14.5 kg of water to prevent the solution from freezing at -15.2 F
In each of the following polyatomic ions, the central atom has an expanded octet. Determine the number of electron pairs around the central atom and the hybridization in: SF2 2- AsCl6- Scl4 2- I'm really confused on this one so your thorough help ..
The label on an aerosol spray can contains a warning that the can should not be heated to over 130°F because of the danger of explosion due to the pressure increase as it is heated.
Draw the two possible products of the reaction between benzaldehyde and ethylpropylketone
A weather balloon has a volume of 450 L when filled with helium at 45oC to a pressure 0.80 atm. What is the new volume of the balloon in an atmosphere where the pressure
Determine the vapor P lowering, freezing point depression, boiling point elevation, and osmotic pressure when the sample is dissolved in 10.0 g water
naturally occurring isotopes, Re-185 (mass = 184.935 amu) and Re-187 (mass = 186.956 amu). Calculate the percent abundances of the isotopes of rhenium.
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