9. A mixture of 8.00g of O2(g) and 8.00 g of CH4(g) is placed in a 15.0L vessel at 27 o C, what is the partial pressure of each gas and what is the total pressure in the vessel? (PO2(g), PCH4(g) , Ptotal) (A) (0.41, 0.82, 1.23) (B) (0.82, 1.23, 2.05) (C) (0.25, 0.25,0.5) (D) (0.5, 0.5, 1.0) (E) (0.5, 0.25, 0.75)