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Problem 1. Determine the percent composition by mass of each element in C,H.02 71802 Problem 2. A particular compound is composed of 31.06 grams Zn, 4.79 grams H, 26.61 grams N, and 30.46 grams S. The compound has an actual molar mass of 586.85 g/mol. Determine both the empirical and molecular formula Problem 3. Using the following unbalanced equation, 16.8 grams of H2S will make how many grams of Cr2S3? Cr203 + H2S Cr2s, + H2O Problem 4. A 5.53 cm long empty cylindrical glass tube, sealed at one end, has a mass of 6.73 g. After the tube was completely filled with ethanol, the mass was found to be 7.25 g The density of ethanol is 0.786 g/mL. Determine the inner diameter of the tube, in mm.
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