Using Boyle's Law (assuming constant pressure)
A sample of oxygen gas occupies a volume of 250 mL at 740 torr pressure. What volume will it occupy at 800 torr pressure?

Question

Using Boyle's Law (assuming constant pressure)
A sample of oxygen gas occupies a volume of 250 mL at 740 torr pressure. What volume will it occupy at 800 torr pressure?

anonymous · Answer

I only know the full ideal gas law:
PV=nrT
n = PV/rT

We know that the number of molecules will stay the same so:
PV/rT = PV/rT    (in the two situations)
PV = PV              (gas constant and temp are the same)
740 * 250 = 800V
V = 185000/800
V = 231.25mL

Never heard of the torr before. Interesting measurement

anonymous · Answer

... uh 760mmHg = 760 torr=1atm

joannablackwelder · Answer

Boyle's law is P1V1=P2V2 so 740*250=800*V2. Solve for V2.