Select the correct answer.
An iron bar at 200°C is placed in thermal contact with an identical iron bar at 120°C in an isolated system. After 30 minutes, both iron bars are at
160°C. If the iron bars were placed in thermal contact in an open system instead of an isolated system, how would the results be different?
Assume that the room temperature is 25°C.
A The temperatures of the iron bars after 30 minutes would be less than 160°C because heat would be lost to the surroundings.
B. It would take more than 30 minutes for both iron bars to reach 160°C because heat would be transferred less efficiently.
C. The temperatures of both iron bars would increase as they absorb heat from the surroundings.
D. The temperatures of both iron bars would decrease because pieces of them would be lost to the surroundings.

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

Is 9 correct? and can someone me with 10? it’s due tomorrow, you

Why is retrograde motion an apparent motion