Consider the Following First Order Reaction for the Decomposition of Dinitrogen

question 14

Multiple Choice

Consider the following first order reaction for the decomposition of dinitrogen pentoxide:
N₂O₅(g) 2 NO₂ (g) + O₂(g) At 70 C, the rate constant, k , for this reaction equals 6.82 * 10^-3 s^-1 . If the initial concentration of N₂O₅ equals 0.0125 M, how long would it take for the concentration of N₂O₅ to reduce to 0.00500 M?

• A) 6.25×10 ^{- 3} sec
• B) 58.3 sec
• C) 102 sec
• D) 134 sec
• E) 177 sec

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Definitions:

Right Ventricle

The lower right chamber of the heart that pumps oxygen-depleted blood to the lungs for oxygenation.

Pulmonary Trunk

A major blood vessel that carries deoxygenated blood from the right ventricle of the heart to the lungs for oxygenation.

Cushion the Heart

Likely refers to the protective layer around the heart, such as the pericardial fat or the pericardium, but without specific context, the term is ambiguous.

Outermost Layer

The external surface or coating of an object or body.