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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) + CrO42(aq)
H2(g) + F2(g) 2HF(g) H = -542 kJ How many grams of H2(g) would have to react to produce 197 kJ of energy?
If 3.17 moles of ethane, C2H6 undergo combustion,according to the unbalanced equation C2H6+O2--> CO2+H2O, how many moles of oxygen are required?
If 159 of wet is collected over water at 24 and a barometric pressure of 737 , how many grams of have been consumed.
If the density of N2 gas in a rigid flask is 0.243 g/L at 18 °C, what is the pressure of nitrogen in the flask if it is heated to 36 °C
A 1.00 L balloon filled with nitrogen at 25 ° C and 765.3 torr is moved to a closed vessel with the pressure now at 659.3 torr and temperature 25 ° C.
A buffer contains 0.30 M acetic acid and 0.20 M sodium acetate. What is the pH of the buffer as prepared and after 0.030 mol/L of a strong acid or 0.030 mol/L of a strong base are added (Ka = 1.8 x 10-5).
Prepare 1.00L of a pH~12 buffer with a total phosphate concentration of 0.050 M.You have at your disposal the following compounds
Heated and allowed to expand against a constant pressure of 1.20 atm until its volume reaches twenty eight Litres. Now determine Which of the given data is correct?
a corrosion technologist pipetted a 100 ml hard water sample and titrated it with 37.64 ml of 0.01 M EDTA solution for a total endpoint, and 29.32 ml of 0.01 M EDTA solution for a calcium endpoint.
How many milliliters of 6 M HNO3 would you add to 300 mL of the buffers solution to change the pH from 5.09 to 5.03?
Analysis of corrosion mechanisms and preventative measures
Titration of 15mL of 0.125M unknown base with 0.103M HCl required 18.2mL to reach the equivalence point. the pH at the equivalence point was 2.74.
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