Consider the mechanism. step 1: 2a↽−−⇀b+c equilibrium step 2: b+d⟶e slow overall: 2a+d⟶c+e determine the rate law for the overall reaction, where the overall rate constant is represented as

Answer : The rate law for the overall reaction is,

Explanation :

As we are given the mechanism for the reaction :

Step 1 :    (equilibrium)

Step 2 :     (slow)

Overall reaction :

First we have to determine the equilibrium constant from step 1.

The expression for equilibrium constant will be,

Form this, the value of [B] is,

      ............(1)

Now we have to determine the rate law from the slow step 2.

The expression for law will be,

      .............(2)

Now put equation 1 in 2, we get:

Therefore, the rate law for the overall reaction is,

the answer is the first electromagnet (a). this is because it has more coils around the ferromagnetic material. increasing the number of coils increases the surface area in which the metal interacts with the current in the coil. this enables more atoms in the metal to become aligned hence becoming more magnetized.