Please explain both parts of this question. Thank you

A gas vessel contains 40.0g of oxygen and 40.0g of helium with a total pressure of 18 atm. Calculate the partial pressure of each gas? A. The partial pressure of oxygen is 2.01 atm The partial pressure of helium is 15.99atm B. The partial pressure of oxygen is 9 atm The partial pressure of helium is 9 atm C. The partial pressure of oxygen is 12.1atm The partial pressure of helium is 5.9 B. The partial pressure of oxygen is 9 atm The partial pressure of helium is 9 atm C. The partial pressure of oxygen is 12.1 atm The partial pressure of helium is 5.9 atm D. None of above The vapor pressure of Chloroform (CHCl3) is 197mmHg at 23.0C; and 448mmHg at 45.0C. Calculate the molar heat of vaporization and the normal boiling point of Chloroform. A. 29.2kJ;344K B. 29.2kJ;234K C. 29.2kJ;334K D. 29.2J;334K