<p>The rate of the slowest step is always equal to the overall rate of the reaction. Just by looking at it, you could deduce that it is Mechanism A because it is the only mechanism with NO2 in it.</p>
<p>Hope that helps</p>
<p>The rate of the slowest step is always equal to the overall rate of the reaction. Just by looking at it, you could deduce that it is Mechanism A because it is the only mechanism with NO2 in it.</p>
<p>Hope that helps</p>