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With a solution in them connected by a liquid salt bridge junction filled with KNO3. In one solution you have a graphite electrode that is connected with a wire to a copper electrode in the second s
How many mmoles of ammonia would have to be added to 300. mL of 0.10 M cupric sulfate in order to reduce the Cu2+ concentration to 1.0 x 10-8 ? Kf for [Cu(NH3)4]2+ = 5.0 x 1012 Assume no change in vol
What molarity of sulfide ion will produce the greatest amount of lead sulfide (Ksp = 8.0 x 10-28) precipitate without precipitating any tin(II) sulfide(Ksp = 1.0 x 10-25)
The mass spectrum of an organic compound shows the relative abundance of M to be 34.29% and M+1 to be 8.901%. Assuming the peaks are caused by 12C and 13C isotopes, determine the number of carbon at
1.50 mol of helium gas in a cylinder is held at a volume of 22.4 L by a piston at 273K and 1.00 atm. Heat is supplied to the system to double the volume and temperature of the gas while maintaining
calculate the molar concentration of the final solution. assume volume remains constant
calculate the molarity of a solution prepared by diluting 1.20 x 10^2 ml of 2.725 solution to 125.0 ml
A 16.0 ounce specially drink contains 349 mg caffeine. what is the concentration of caffeine in this solution? one fluid ounce is equivalent to 29.57ml. the formula for caffeine is c8H10N4O2
Please give a balanced equation with a stepwise mechanism for the preparation of 3,4-methylenedioxychalcone from piperonaldehyde and acetophenone (with ethanol)
The reaction of acylate ethylbenzene with acetylchloride using a friedel crafts reaction to give 4-ethylacetophenone, then react this with benzaldehyde (aldol)
Magnesium hydroxide (Mg(OH)2) reacts with hydrochloric acid to produce magnesium chloride and water. How many liters of 0.8 M HCl react with 0.25 grams of magnesium hydroxide
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.
Calculate the pH of a buffer solution containing 0.65 M CH3COONa. Calculate the pH after 0.0010 mol HCl is added to 450.0mL of buffer.
Looking at the colors of the mixtures containing 5.0, 6.7, and 7.5 mL of EN, would you conclude that you prepared one, two, or all three complex ions when you combined the various mixtures of 2.0 X
Do these lambda maxs indicate an increase or a decrease in the energy of the light absorbed as the number of EN ligands bound to Cu(II) increases
the lambda max for one Cu2+ complex ion is longer than the lambda max for a second Cu2+ complex ion, is the coordinate covalent bonding between ligands and Cu2+ stronger in the first or second compl
The wavelength ranges corresponding to each color of light are approximate: red, 700-620 nm; orange, 620-590 nm ; yellow , 590-570 nm; green, 570-500 nm; violet, 450-400nm. You have drawn the absorp
The maximum value of n in [Cu(EN)n]2+ for a Cu2+-EN solution is the key to a gravimetric method for determining the amount of Cu2+ in an unknown aqueous solution.
Suppose that 5193.0 J of heat energy is added to 7 g of ice initially at -10 C. (This could be done, for example, by electrical heating of ice in an insulated container.) What is the final temperatu
If 5.00 grams of dry nitrogen dioxide gas (made wet because it was collected over water) were placed in a 5.00-L container, what will be the final pressure (in torr) in the container when the reacti
Determine the bond order of each and classify it as stable or non-stable. If stable, tell whether the species is paramagnetic or diamagnetic.
For each of the following species, draw its Lewis-dot structure. If the species exhibits resonance, draw all the resonance hybrids. For each species, tell its shape, bond angles, hybridization of th
Which of the following solutes in aqueous solution would be expected to exhibit the largest freezing-point lowering (assuming ideal behavior)