An ion selective electrode used to measure Mn2+ is also sensitive to Li+ and obeys the equationE = constant + 57.1 mV/2 log{[Mn^2+] + 0.002[Li^+]2}When the electrode was immersed in 100.0 mL of unknown containing Mn^2+ in 0.200 M LiCI, the reading was 194.6 mV. When 1.00 mL of 1.07 X 10^-2 M Mn^2+ (in 0.2 00 M LiCI ) was added to the unknown, the reading increased to 200.7 mV. Find the concentration of Mn^2+ in the original unknown.

Using this reversible reaction, answer the questions below: n2o4 2no2 (colorless) (reddish-brown) -as the temperature increased, what happened to the n2o4 concentration? -was the formation of reactants or products favored by the addition of heat? -which reaction is exothermic? right to left or left to right? -if the change of enthalpy of this reaction when proceeding left to right is 14 kcal, which chemical equation is correct? n2o4 2no2 + 14 kcal n2o4 2no2, hr = +14 kcal n2o4 + 14 kcal 2no2 n2o4 2no2, hr = -14 kcal