LT 2.2.1: Identify the purpose of an investigation and/or the major concepts being investigated. Joselin was given a sample of metal that she was told was pure gold. She wasn't sure that she could trust the person who gave her
the metal so she decided to test it to make sure it was actually pure gold. Luckily Joselin learned in chemistry class that you can
identify metal by determining its density. She measured the mass of the metal and then determined its volume by displacement. After
completing her calculations she found that the density of her metal was 8.94 g/cm3. She compared her calculated density to a list of
known metal densities and determined that her metal sample was copper and not gold.
What is the purpose of Joselin's lab investigation

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

Astable electron arrangement for an atom is one that does not easily change. how is this arrangement arrived at? a. valence electrons are transferred or shared to create a full outer shell of electrons. b. valence electrons are discarded into space to create a full outer shell of electrons. c. protons (positive charge) pair with valence electrons (negative charge) to create a strong bond. d. outer shells with valence electrons are transferred or shared.

What’s the theoretical yield of solid lead