A sample of oxygen gas occupies a volume of 250. mL at a pressure of 740. torr. What volume will the gas occupy at a pressure of 800. torr if temperature is held constant?

Answer: we will solve it using Boyle's law that is:

P1V1 = P2V2

Explanation:

Substituting the given values

740 torr * 250 mL = 800 torr * V2

rearranging the equation for V2

740 torr * 250 mL / 800 torr = V2

'torr' in numerator cancelled by 'torr' in denominator

740 * 250 mL / 800 = V2

V2 = 231.24 mL