Question

A gas occupies a volume of 120. mL at 700. mm Hg. What volume does it occupy at a pressure of 150. mm Hg?

Answer 1

At pressure, P = 700 mmHg

Volume, V = 120 mL

When pressure , P' = 150 mmHg

If volume = V'

Then, according to Boyle's law

   PV = P'V'

Or, V' = PV/P'

Or, V' = 700×120/150

Or, V' = 560 mL

Hence,

560 mL of volume does it occupy at a pressure of 150. mL