What volume in liters does 0.136 g of O2 occupy at 20.0 degree C and 748 torr?
The volume will be
You're dealing with a sample of oxygen gas,
Use oxygen's molar mass to determine th number of moles you have in that sample first
Now plug all your values into the ideal gas law equation - do not forget to convert degrees Celsius to Kelvin and torr to atm
Rounded to three sig figs, the answer will be