Тус естатсутс остро The amount of water in the sample
Three identical size beakers - each contained a different liquid, all the same 1 point
temperature, all on the same hot plate. Which of the following observations
would provide evidence that the amount of heat required to raise the
temperature of matter depends on the nature of the matter? *
Before heating, the initial masses of the three different liquids were slightly different.
After turning off the hot plates, all the liquids eventually returned to room
temperature.
Some of the heat from the liquids was transferred to the air around the beakers.
After the same amount of time, the three samples were at different temperatures.

Arock can be broken down into different kinds of substances by physical processes. no chemical reactions are needed to separate different parts of a rock into pure substances. this is because a rock is a(n)

Which of the following statements is true about planck’s law

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