AP Chemistry chapter 2 supplemental class problems

AP Chemistry chapter 2 supplemental class problems - AP...

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AP Chemistry – Chapter 2 Supplemental Class Problems Name: ______________________________ Date: ______________ Period: _____ 1. It is common in chemistry to assume that the mass of a cation is the same as that of its parent atom. a) Using the following data: p = 1.0073amu, n = 1.0087amu and e = 5.486x10 -4 amu, determine the number of significant figures that must be reported before the difference in mass of H 1 1 and + H 1 1 is significant. b) What percentage of the mass of an H 1 1 atom does the electron represent? 2. The diameter of a U.S. penny is 19mm. The diameter of a copper atom, by comparison, is only 2.6Å. How many copper atoms could be arranged side by side in a straight line across the diameter of a penny? 3. Using the mass of the proton and assuming its diameter is 1.0x10 -15 m, calculate the density of a proton in g/cm 3 . 4. The mass-to-charge ratio of the positron (a product of the radioactive decay of certain isotopes) is 5.6x10 -12 kg/C. The charge on a positron is the same as that on a proton. Calculate the mass of a positron.
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AP Chemistry chapter 2 supplemental class problems - AP...

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