A student made measurements on some electrochemical cells and calculated three quantities:
The standard reaction free energy ΔG°.
The equilibrium constant K at 25 °C.
The cell potential under standard conditions E°.
His results are listed below.
calculated quantities
cell n (Identify any that are wrong.)
ΔG° K E°
A 2 -156. kJ / mol 4.68 x 10^(-28) 0.81 v
B 2 -147. kJ / mol 5.67 x 10^(25) -0.76 v
C 2 -69. kJ /mol 8.16 x10^(-13) -0.36 v

Unfortunately, the student may have made some mistakes. Examine his results carefully and identify the incorrect quantity in each row, if any.
Note: If there is a mistake in a row, only one of the three quantities listed is wrong.
Also, you may assume the number of significant digits in each quantity is correct. Also note: for each cell, the number of electrons transferred per redox reaction is 2.

Brad and his family like to go camping. they always take a gas lantern with them. the lantern can take fiuels but always puts out the same amount of light. brad has two different kinds of fuel for the lantern. how can he figure out which kind of fuel has more chemical energy that the lantern can turn into light? measure the brightness of the lantern using each kind of fuel by comparing it to the full moon. g measure the volume of the containers of fuel. measure how long the lantern stays lit on a fixed amount of fuel. measure the mass of each container of fuel using a balance scale. answer 12

The name of the ion, s2-, is: sulfurous ion sulfide ion sulfur ion sulfate ion

Salicylic acid is a very important acid. it is used to synthesize the aspirin by treating with acetic anhydride. a 0.2015-g sample of salicylic acid was dissolved in a 100.00-ml volumetric flask, and the solution was diluted to the mark. a 10-ml aliquot of this solution was titrated with standard naoh (0.01130 + 0.2% n) to a phenolphthalein faint pink color end point at 19.81 ml. (a) (calculate the normality of the salicylic acid solution used in the titration. (b) assuming the salicylic acid is pure, what is the equivalent weight of the salicylic acid? practice problems for the final exam (continued) (c) (calculate the inherent error in the determination of the equivalent weight you calculated in part (b). use the following absolute errors in the equipment /glassware when calculating the inherent error. 5.00-ml pipet: + 0.02 ml 100-ml volumetric flask: + 0.08 ml analytical balance: + 0.2 mg 25-ml buret: + 0.03 ml