You have a stock solution certifi ed by a manufacturer to contain 150.0 6 0.3 mg so22 4 /ml. you would like to dilute it by a factor of 100 to obtain 1.500 mg/ml. two possible methods of dilution are stated below. for each method, calculate the resulting uncertainty in concentration. use manufacturer’s tolerances in tables 2-3 and 2-4 for uncertainties. explain why one method is more precise than the other. (a) dilute 10.00 ml up to 100 ml with a transfer pipet and volumetric fl ask. then take 10.00 ml of the dilute solution and dilute it again to 100 ml

Asmall amount of a solid is added to water. the observation made after fifteen minutes is shown in the figure. which of these solids has been probably added to water? a) oil b) sand c) sugar d) wood chips

How do cfcs cause ozone depletion? how do cfcs cause ozone depletion? ultraviolet radiation breaks down cfcs, molecules containing chlorine. chlorine then breaks one oxygen atom away from ozone, leaving behind a paired oxygen molecule. ultraviolet radiation breaks down cfcs, molecules containing chlorine. chlorine then breaks two oxygen atoms away from ozone, leaving behind a paired oxygen molecule. ultraviolet radiation creates cfcs, molecules containing chlorine. chlorine then breaks two oxygen atoms away from ozone, leaving behind a paired oxygen molecule. ultraviolet radiation creates cfcs, molecules containing chlorine. chlorine then breaks one oxygen atom away from ozone, leaving behind a paired oxygen molecule.

Four statements about the development of the atomic model are shown below. a: electrons have wavelike properties. b: atoms have small, negatively charged particles. c. the center of an atom is a small, dense nucleus. d: atoms are hard, indivisible spheres. which order of statements represents the historical development of the atomic model? c-d-a-b c-d-b-a d— в-а — с d-b-c-a