Answer
The final pressure is 1407.56 mmHg
Step-by-step explanation
Given:
Initial volume, V₁ = 15.5 L
Initial pressure, P₁ = 840 mmHg = 1.10526 atm
Final volume, V₂ = 9.25 L
What to find:
The final pressure, in mmHg.
Step-by-step solution:
The final pressure, P₂ can be calculated using Boyle's law formula.

Putting the values of the given parameters into the formula, we have;

The final pressure is 1407.56 mmHg