Exam 1 Sample Exam - Department of Chemistry CHM 1220/1225...

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Unformatted text preview: Department of Chemistry CHM 1220/1225 Exam I – Sample Exam Note: The exam may not resemble this sample exam; completing it will help you prepare for the exam. 1. Barium chloride reacts with sulfuric acid to produce a white precipitate of barium sulfate. A volume of 10.0 mL of 4.50 M sulfuric acid solution is needed to react completely with 25.0 mL of barium chloride solution. a. Write the balanced chemical equation. b. What is the concentration of the barium chloride solution? c. How many grams of barium chloride were present in the 25.0 mL of solution? 2. a. Calculate the grams of phosgene, COCl 2 produced when 10.0 g Cr 2 O 3 react with 25.0 g CCl 4 according to the reaction: Cr 2 O 3 + 3 CCl 4 –––> 2 CrCl 3 + 3 COCl 2 b. How many grams of each reactant remain. 3. What is the frequency of light with a wavelength of 555 nm? What is the energy of one mole of these photons? 4. What is the wavelength of the electromagnetic radiation involved when an electron in hydrogen undergoes a...
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Exam 1 Sample Exam - Department of Chemistry CHM 1220/1225...

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