1. Distinguish between physical and chemical changes. Include examples in your explanations. 2. What are the differences among elements, compounds and mixtures? 3. Fill in the chart below to identify the properties of shape and volume for each type of matter. 4. Explain how atomic mass and molecular mass are determined. 5. Fill in the chart below to identify and describe the parts of an atom. 6. Identify the assumptions made as part of Dalton’s atomic theory.

How many moles are equivalent to 55.5g of nano3

What is the maximum number of electrons that an atomic orbital can contain?

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