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The polarogram for 20ml of solution that was 3.65*10^-3 in Cd2+ gave a wave for that ion with a diffusion current of 31.3µA . calculate the percentage in change in concentration of the solution if the current in the limiting current region were allowed to continue for 5 min
Determine the concentration of the original Na 2 C 2 O 4 solution and disodium oxalate in the presence of excess acid.
Calculate the average speed of a gas that has a molar mass of 2.08 × 10-2 kg /?mol at a temperature of 22°C. The value for the gas constant, R, is 8.314 J /?mol K.
What one reagent should re-energize the light solution after it has faded? Explain using moles and limiting reagents.
A gas cylinder containing 6.38 mol of neon has pressure of 491mmHg at 295k. If 3.22 mol helium is added at constant temp and pressure, what will be the pressure in the cylinder
At 0.967 atm, the height of mercury in a barometer is 0.735 m. If the mercury were replaced with water, what height of water (in meters) would be supported at this pressure.
a 150.0 g sample of metal at 80 c is added to 1500.0g of H2O at 20 c. the temperature rises to 23.3 c. assuming that the calorimeter is a perfect insulator, what is the specific heat of the metal.
A sample of gas at 47°C and 1.03 atm occupies a volume of 2.20 L.What volume would this gas occupy at 107°C and 0.789 atm?
Draw the structure of Caffeine. Skeletal form only. Locate 2 bonds in the molecule that are obviously polar covalent.
Explain the following observations. 1. Aziridines, compounds that contain nitrogen in a three-membered ring, undergo pyramidal inversion much more slowly than do other alkylamines
Calculate the concentration of ions in the following solutions, [I] in AgI in AgI solution with [Ag+] = 9.6E-9 M Ksp=8.3E-17
in a laboratory, 6.82 g of Sr(NO3)2 is dissolved in enough water to form 0.500 L of solution. A0.100-L sample is 0.0245 M solution of Na2CrO4.
When 25mL of a 120mL stock solution containing 2M AlCl3 is diluted to 80mL, how many moles of Al3+ are in the new solution.
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