EXAM PROBLEM #4 Instructions: Type your answers to the que…
EXAM PROBLEM #4 Instructions: Type your answers to the questions in the textbox below. Label your answers A, B, C, D, E, F. Show all work on your “work” page. Label which problem it is (#4). Situation: Suppose 125 grams of O2 and 185 grams of ClO2 are combined in a closed rigid container and the following reaction occurs: 3 O2 (g) + 4 ClO2 (g) –> 2 Cl2O7 (g) Molar masses: O2 = 32.00 g/mol | ClO2 = 67.45 g/mol | Cl2O7 = 182.90 g/mol Questions: A. How many moles of O2 are present initially? B. How many moles of ClO2 are present initially? C. How many moles of O2 are present at the end? D. How many moles of ClO2 are present at the end? E. How many moles of Cl2O7 are present at the end? F. What is the total pressure at the end if the container has a volume of 74.0 L and the temperature is 444 K?
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