High concentration of water and salt is the main ingredient of brine. Salt being NaCl and water make brain and important solution in making of chlorine.
Electric terminals are put inside the solutions and with the help of electric current the chemical properties of the solution are changed such that we get chlorine as outcome. This process is carried out in a large scale to get chlorine from NaCl in solution and is called electrolysis of Brine.
Answer : The final pressure of the gas is, 
Explanation :
Boyle's Law : It is defined as the pressure of the gas is inversely proportional to the volume of the gas at constant temperature and number of moles.
or,
where,
= initial pressure = 545 mmHg
= final pressure = ?
= initial volume = 775 mL
= second volume = 171 mL
Now put all the given values in the above equation, we get:
Therefore, the final pressure of the gas is,
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