A 0.763 L cylinder containing B4H8 at a pressure of 0.600 atm is connected by a valve to 9670 mL cylinder containing SF2 at 0.350 atm pressure. Calculate the partial pressure (torr) of B4H8 when the valve is opened.

A gas sample prepared from 12.8 g of SO3, 37.8 g of C3H6 and 28.7 g of C5H10 has a total pressure 0.780 atm. Calculate the partial pressure (torr) of C5H10 in the sample.