Answer:
.5696
Step-by-step explanation:
The ideal gas equation is PV=nRT, P=pressure, V=volume, n=moles, R=gas constant (.0821), T=temperature. So all you have to do is convert C to K, plug in the numbers and divide both sides by volume and you get your pressure.
P*98.3=2*.0821*(68+273)
P*98.3=2*.0821*341
P*98.3=55.9922
P=55.9922/98.3
P=.5696