The overall reaction is 2CH4(g)+3Cl2(g)2CH3Cl(g)+2HCl(g)+2Cl(g) Suppose that a chemist combines 259 mL of methane and 641 mL of chlorine at STP in a 2.00 L flask. The flask is then allowed to stand at 298 K. If the reaction reaches 75.3% completion, what is the total pressure in the flask? What is the partial pressure of CH4? What is the partial pressure of Cl2? What is the partial pressure of CH3Cl? What is the partial pressure of HCl? What is the partial pressure of Cl?