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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.
The half life of polonium-210 is 138.4 days. How many milligrams of polonium-210 remain after 415.2 days if you start with 2.0 mg of the isotope?
an aqueous solution contains the amino acid glycine (NH2CH2COOH). Assuming that the acid does not ionize in water, calculate the molarity of the solution if it freezes at -2.7 Degree celsius
Consider the following reaction. N2 + 3H2 -> 2NH3 . 28.0 grams of N2 and 5.04 grams of H2 are reacted, producing 17.8 grams of NH3. What is the percent yield?
Calculate the work for a process which one mole of NH3 gas is expanded from 1.0L to 20.0L in an isothermal reversible process at 300K.
22.3 g of a substance X dissolves in enough water to make 0.507 L of a 0.779 M solution. Calculate the molar mass of X in g/mol.
If fuel mixtures are required to contain 3.0 oxygen by mass, how many grams MTBE must be present in each 110 gasoline.
A 10.00 mL sample of the resulting solution is transferred into an Erlenmeyer flask for a titration. How many grams of baking soda are present in the 10.00 mL sample?
gasoline has the density of .73g/cm^3. how many liters of gasoline would be required to increase the mass of an automobile from 1271 kg to 1305 kg.
Calculate the values of E for the cell when the following volumes of the Cu titrant have been added: (Activity coefficients may be ignored as they tend to cancel when calculating concentration ratios.
If you measure the refractive indices of two liquids and they are within 0.0001 units from eachother, how likely is it that the two liquids are identical
How many grams of Cr can be produced by the reaction of 44.1 g of Cr2O3 with 35.0 g of Al according to the following chemical equation. 2Al + Cr2O3 ? Al2O3 + 2Cr
Consider the following standard reduction potentials in acid solution: Cr3+ + 3e- ? Cr Eo = -0.74 V, Co2 + 2e- ? Co Eo = -0.28 V, MnO4 + 8H+ + 5e- ? Mn2+ + 4H2 Eo = +1.51 V
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