Mdcps_2003345_chemistry 1 a-cr
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an experiment was conducted to see which metal pot would be better for cooking food quickly. the table below shows how
quickly small pieces of wax melted during the experiment
time for the wax to melt (seconds)
27
type of metal
aluminum
bronze
copper
steel
45
15
80
the following statement was made after the data were examined: copper pols are the best pots for cooking food quickly."
which term best describes this statement?
conclusion
hypothesis
procedure
result

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

Compare and contrast the bohr model and the electron cloud models of the atom.

Which of these is not an example of chemical weathering? a. iron-rich mineral rusting b. feldspar turning into clay c. limestone reacting with acid d. granite breaking up into sand