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Question: Silver can be electroplated at the cathode of an electrolysis cell by the half-reaction:
Ag+(aq) + e- ? Ag(s)
What mass of silver would plate onto the cathode if a current of 5.9 A flowed through the cell for 71 min, in grams?
a student carried out the experiment but did not follow the directions exacly as written. What effect would the following actions have on the experiment ?
A 4.0L sample of air collected at 298 K and then cooled to 278F while held at constant pressure. What is the new volume of the air
One student measure the pH of the following three solution (weak base, conjugate acid and buffer). Using this data, please calculate the pKa and pKb (show calculation).
Determine the mass percentage concentration of a sodium hydroxide solution produced by mixing 50.0 mL of a 25 % (density=2.45g/mL) sodium hydroxide solution with 10.0mL of H 2 O?
Predict whether each of the following oxides is acidic, basic, amphoteric, or neutral: CO2, NO2, Al2O3, CaO.
A 2.45 g sample of a gaseous oxide of nitrogen occupies a volume of 1.34 L at 28°C and 745 mmHg. What is the most likely formula for the gas. A. NO B. N2O4 C. N2O D. NO2
Once ready, he put a bit of sand on top. He loaded about 1 gram of product that had been dissolved in 1 ml of ethyl acetate.
A giant sequoia tree cut down in 1891, in what is now Kings Canyon National Park northeast of Los Angeles, contained 1342 annual growth rings. If a sample of the tree was removed for radiocarbon dating
Calculate the number of grams of sulfuric acid present in the mixture after the reaction is complete. Calculate the number of grams of lead II sulfate present in the mixture after the reaction is complete.
What is the the mole fraction of a solution prepared by dissolving 0.315 g of cholesterol
Chemists have discovered nearly 300 different anthocyanins. Finish drawing a resonance contributor in Box 3 that shows positive charge on one of the other oxygens in this anthocyanin. It is not necessary to draw any electron flow arrows in your re..
The heat of vaporization of water =40.66 kJ/mol at 100 °C. Compute the quantity of heat that is absorbed/released when 9.00 grams of steam condenses to liquid water at the temperature of100 degree celsius.
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