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Heart pacemakers are often powered by lithium-silver chromate "button" batteries. The overall cell reaction is: 2 Li(s) + Ag2CrO4(s) ? Li2CrO4(s) + 2 Ag(s) The overall cell potential is 3.5V. What is the half-cell potential for the follow half reaction? Ag2CrO4(s) + 2e? ? 2 Ag(s) + CrO4-2?(aq)
hydrochloric acid was added to a 50.00 mL solution containing your sodium carbonate unknown. calculate the pH of the solution at the second equivalence point.
Fumaric acid, which occurs in many plants, contains 41.4% C, 3.47% H, and 55.1% O by mass. A 0.5 mol sample of this compound has a mass of 58.0 g.
calculate the equilibrium concentration of HI when 0.500 M HI, 0.0200 M H2, and 0.0200 M I2 are placed in a sealed flask and allowed to reach equilibrium. Kc for this reaction is 50 at 445 ºC.
Normal fasting levels of blood glucose in human are around 800mg/L. What is the molarity of glucose in the bloodstreem
what is the final volume of the air saturated with water vapor if the total pressure is maintained at 1 bar? what are the mole fractions of N2, O2, and H20 in the moist air? Assume all gases are ideal
Methane and oxygen react in presence of a catalyst to form formaldehyde (desired product). In a parallel reaction, methane is oxidized to form carbon dioxide and water
Construct a rough plot of pH versus volume of added base for the titration of 50 mL of 0.050 M HCN with 0.075 M NaOH. Ka = 4.0*10^-10 for HCN (a) What is the pH before any NaOH is added? pH = 5.36 (b) What volume of base, in milliliters, is requir..
30.3 g of chromium(III) oxide reacts with 10.8 g of aluminum to produce chromium and aluminum oxide. If 20.7 g of chromium is produced, what mass of aluminum oxide is produced?
A feed mixture weighing 200 kg of unknown composition containing water, acetic acid, and isopropyl ether is contacted in a single stage with 280 kg of a mixture
Elements in the first short period are limited by the octect rule whereas those in the higher period can expand their valence shells. Describe what this means, account for this phenomenon and give an example of each.
for a stadium that would be in the sun for long periods of day, excluding cost as a factor, why would you choose wood over aluminum or iron?
Calculate the number of mmoles of primary standard grade Na2CO3. b. How many mmoles of HCl reacted with the Na2CO3? c. Calculate the molarity of the HCl solution.
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