Calculate final partial pressures of cl2 ando2 in reactor

Question

An evacuated reaction vessel with a volume of 10.0 liters is filled with chlorine gas at 25 C and a pressure of 1.00 atm. Al₂O₃ and NaCL are added and the mixture is heated to 850 C until the reaction is complete. The following reaction is used to produce NaAlCl₄:
2 Al₂O_{3 (s)} + 6Cl_{2 (g)} + 4NaCl (l)--> / <--- 4 NaAlCl_{4 (l)} + 3O_2(g)
The final total pressure in the vessel (at 850 C) is 2.70 atm.
1. Calculate the final partial pressures of Cl₂ andO₂ in the reactor.
2. Determine the mass of NaAlCl₄ produced in the reaction.