The density of a gas is found to be 1.56 g/litre at 745 mm pressure and `65^(@)C`. Calculate the molecular mass of the gas.

Explanation

To calculate the molecular mass of the gas using the given density, pressure, and temperature, we can use the ideal gas equation rearranged in terms of density. Here’s a step-by-step solution:

### Step 1: Write the Ideal Gas Law
The ideal gas law is given by the equation:
\[ PV = nRT \]
Where:
- \( P \) = pressure (in atm)
- \( V \) = volume (in liters)
...