You Wish to Measure the Changes in Pressures of Gases $\rightarrow$

question 148

Multiple Choice

You wish to measure the changes in pressures of gases during the course of a reaction using a closed-end mercury manometer.Suppose 758 mmHg N₂O₄ is allowed to react to form NO₂ according to the reaction N₂O₄ (g) $\rightarrow$ 2 NO₂ (g) .The total pressure you measure as the reaction proceeds is the sum of the pressures of N₂O₄ and NO₂ present.When the total pressure is 1039 mmHg, what is the pressure of N₂O₄?

• A)477 mmHg
• B)281 mmHg
• C)576 mmHg
• D)379 mmHg
• E)553 mmHg

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