Express the rate of the following reaction in terms of disappearance of hydrogen in the reaction:
` 3H_(2(g)) +N_(2(g) ) to 2NH_(3(g))`

Explanation

To express the rate of the reaction in terms of the disappearance of hydrogen, we can follow these steps:

### Step 1: Write the balanced chemical equation
The balanced chemical equation for the reaction is:
\[ 3H_2(g) + N_2(g) \rightarrow 2NH_3(g) \]

### Step 2: Define the rate of reaction
The rate of a reaction can be expressed in terms of the change in concentration of reactants and products over time. For a general reaction:
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