What type of reaction is described in the following scenario:A white solid called sodium carbonate was placed into a test tube and heated over a bunsen burner. At first it looked very similar to salt, but was stark white. As it heated up, you could see condensation forming on the tube, and the sodium carbonate changed to a solid white chunk. To test if there was any carbon dioxide present, a match was lit and placed inside the tube. It immediately was extinguished, indicating that carbon dioxide was present. Meaning that the sodium carbonate changed into sodium oxide and released carbon dioxide.

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

Chemical energy is a form of a. kinetic energy only. b. both potential and kinetic energy. c. neither potential nor kinetic energy. d. potential energy only. reset

The same side of the moon always faces earth because the