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1.0M CuSO4 solution was electrolyzed for 28 minutes and 22 seconds using copper electrodes. The average current flowing through the cell over the time period was 0.622 A. The mass of the copper anode before electrolysis was 2.4852g and 2.1335g afterward. a) Calculate the number of moles of copper oxidized and moles of electrons that passed through the cell. b) Calculate the total charge (coulombs) that passed through the cell. c) How many electrons passed through the cell during the 28.0 minute and 22 second time period. d) From the data ,calculate Avogadro's number.
Diamond is the hardest known substance. Fe metal is soft sunstance. Using your knowledge of bonding, explain why diamond is hard
Define the Octet and Duet rule and how it explains the charges on common ions and both covalent and ionic bonding (for representative elements only)
when 56.6g of calcium and 30.5g of nitrogen gas underfo a reaction that has a 93.0% yield, what mass g of calcium nitride forms.
the atmosphere and since CO2 dissolved in water causes it to be slightly acidic, will the use of deionized water that has not been previously boiled cause the mass
Platinum exhibits an extremely intense emission line at 214.4 nm. Could the spectroscope that you used in this lab, also be used to observe this electromagnetic radiation?
What is the correct method for determining how many moles of calcium oxide are produced in the reaction of 10.g calcium with excess oxygen?
an auto mechanic spills 83mL of 2.6M H2SO4. How many milliliters of 1.2M of NaHCO3 must be poured on the spill to react completely with the sulfuric acid?
if the total amount of energy emitted by a carbon sample is 1.98x10^5 J, determine the number of carbon atoms present in the sample, assuming that each atom emits one photon
Calculate the formate ion concentration and pH of a solution thatis 0.050M in formic acid (HCHO2; Ka=1.8*10^-4) and 0.10M inHNO3
Calculate the mass of urea that should be dissolved in 201 g of water at 35°C to produce a solution with a vapor pressure of 37.1 mmHg.
The change in enthalpy (delta S standard) for a reaction is -31.7 kJ/mol. The equilibrium constant for the reaction is 4.4×103 at 298 K. What is the equilibrium constant for the reaction at 644 K
A sample of cacl2 is dissolved in 250ml. A 5.00ml aliquot of the solution is dissolved to 250ml. Then a 5.00ml of the second solution is dissolved in 500ml. The final solution is analyzed and the chloride concentration is 3.60*10^-5 M. If all the ..
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