4. Calorimetry can be used to determine the specific heat capacity of different substances (not just metals). Using the online calorimeter simulation you perform the following calorimetry experiment: 100g of ethanol at 50.0°C is mixed with 100. g of water at 20.0°C. After mixing the temperature is 31.11°C. Calculate the specific heat capacity of ethanol.

In problem #4 you calculated the specific heat capacity of ethanol from data obtained using the online calorimeter simulation. When you try the same experiment in a real calorimeter, the final temperature after mixing is 34.00°C. Offer an explanation for why the final temperatures are different. Hint: the calorimeter simulation may be missing something.

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

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?

An alpha particle is: a hydrogen atom a nucleus of helium two neutrons an electron