chem-101-extra-credit - Chern 101 Extra Credit A compound...

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Chern 101 Extra Credit A compound was analyzed and found to contain C, H, N, 0, and Cl. When a 0.150 g sample of this compound was burned, it produced 0.138 g of C02 and 0.0566 g of H20. All of the nitrogen in another sample of mass 0.200 g was converted to 0.0238 of NH 3 . Finally, the chlorine in a 0.500 g sample of the compound was converted to Cl· and precipitated as AgCI. The AgCI precipitate had a mass of 1.004 g. Find the empirical formula of the compound. An estimation of the radius of a lead atom: a. You are given a cube of lead that is 1.000 em on each side. The density of lead is 11.35 g/cm 3 . How many atoms of lead are contained in the sample. b. Atoms are spherical; therefore, the lead atoms in this sample cannot fill all the available space. As an approximation, assume that 60% of the space of the cube is filled with spherical lead atoms. Calculate the volume of one lead atom from this information. From the calculated volume (V), and the formula V = 47tr3/3, estimate the radius (r) of a lead atom.
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