The critical temperature and pressure for `NO` gas are 177 K and 64.5 atm respectively. Calculate van der Waals constants 'a' and 'b' for this gas.

Explanation

To calculate the van der Waals constants 'a' and 'b' for the gas `NO` with given critical temperature (Tc) and critical pressure (Pc), we can follow these steps:

### Step 1: Write down the formulas for critical temperature and pressure
The critical temperature (Tc) and critical pressure (Pc) are related to the van der Waals constants 'a' and 'b' by the following equations:
1. \( T_c = \frac{8a}{27Rb} \)
2. \( P_c = \frac{a}{27b^2} \)

Where:
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