Phenol associates in water to double molecules. The values of observed and calculated molecular weight of phenol are `161.84` and `94` , repectively. The degree of association are `161.84` and `94` , repectively. The degree of association of phenol will be
a. 60% , b. 84% , c. 45% , d. 80%

Explanation

To solve the problem of determining the degree of association of phenol in water, we can follow these steps:

### Step 1: Understand the Concept of Association
Phenol associates in water to form dimeric molecules, meaning that two phenol molecules combine to form one dimer. This affects the observed molecular weight.

### Step 2: Identify Given Values
- Observed molecular weight of phenol (M_observed) = 161.84 g/mol
- Calculated molecular weight of phenol (M_calculated) = 94 g/mol
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