# The decomposition of dinitrogen pentoxide is described by the following chemical equation:...

## Question:

The decomposition of dinitrogen pentoxide is described by the following chemical equation:

{eq}2N_2O_5(g) \to 4NO_2(g) + O_2(g) {/eq}

If the rate of appearance of {eq}O_2 {/eq} is equal to 2.40 mol/min at a particular moment, what is the rate of disappearance of {eq}N_2O_5 {/eq} at that moment?

a. 1.20 mol/min

b. 0.60 mol/min

c. 4.30 mol/min

d. 4.80 mol/min

e. 9.60 mol/min

## Decomposition of dinitrogen pentoxide:

The rate of a reaction can be expressed in terms of appearance or disappearance of a substance in the reaction medium with respect to time. The rate of appearance of the products indicated by + sign) and the rate of disappearance of the reactants (indicated by - sign), along with their corresponding stoichiometric ratios, are always equal. Thus, the rate law can be easily determined using that expression.

## Answer and Explanation:

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View this answer{eq}2N_2O_5(g) \to 4NO_2(g) + O_2(g) {/eq}

Therefore, rate = {eq}-\frac{1}{2}\frac{\mathrm{d} }{\mathrm{d} t}[N_2O_5]=+\frac{1}{4}\frac{\mathrm{d}...

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Chapter 12 / Lesson 2Learn the difference between rate constant and rate law. Explore how to use the rate law equation to find the reaction order for one and two reactants.

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