Chloroform (CHCl3) and Carbon tetrachloride (CCl4) form a nearly ideal solution. At 25degrees C, the vapor pressure of our CHCl3 is 199.1mmHg and the vapor pressure of pure CCl4 is 114.5 mmHg. Find out the mole fraction of CCl4 in the vapor that is in equilibrium with a Ccl4-CHCl3 solution that is having 50% by weight CCl4?