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Question 1 1. How many moles of carbon dioxide are formed from the complete combustion of 3 moles of pentane?
Question 2 2. What chemical entity is the reducing agent in the following redox reaction?
Question 3 3. The molar absorptivity coefficient for gamma rays possessing 662 electrovolts of energy that pass through a 1-centimeter-long sample cell containing a benzene solution is 2.82 × 10^-3 liters/mol-cm. If the molar absorbance of the gamma rays is equal to 0.12, what is the concentration of the benzene solution?
Question 4 4. Which of the following elements has the largest atomic radius?
Question 5 5. What is the volume of 825 grams of Krypton gas that is being stored at a temperature of 310 degrees Kelvin and a pressure of 1140 mmHg?
Question 6 6. How many full orbitals are in the 5d subshell of an atom of the element Iridium?
Question 7 7. How many electrons are in an atom of Zirconium at its ground state?
Question 8 8. The equilibrium constant (Kc) for the following reaction at 668 degrees Kelvin is equal to 1.2 × 10^3. If the initial amount of COC2 is 12 moles and there are 0 moles of the products, how many moles of CO will be formed when the reaction is at equilibrium?
Question 9 9. The half-life of Promethium-145 is 17.7 years. How long will it take for an initial mass of Promethium to be reduced by 65%?
Question 10 10. Which of the following statements is false regarding catalysts in chemical reactions?
Question 11 11. If the reaction rate of a chemical reaction with only one reactant increases by two times when the concentration of the reactant is doubled, what is the order of the reaction?
Question 12 12. If 5.50 KJ of energy is required to heat up 0.04 kg of water from its initial temperature to a temperature of 320 degrees Kelvin, what was the initial temperature of the mass of water?
Question 13 13. Which of the following statements is correct regarding a polar covalent bond between two atoms?
Question 14 14. The acid constant (Ka) for HCN (hydrocyanic acid) = 6.2 × 10^-10. If the concentration of hydrocyanic acid = 3.8 M at equilibrium, what is the corresponding concentration of H^+ ions?
Question 15 15. Which of the following chemical entities results from the decomposition of Ba(OH)2?
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