Question

Course Home <MC4 Fractional Distillation ③ 8 or 12 Review Constants Periodic Table - Part The boiling point of a mocture of two volatile liquids depends on how much of each component is present This graph shows the boiling temperature versus mole fraction composition (Figure 1) Fractional disolation is a physical process used to separate the volatile components of a mixture. The process is accomplished Predict the mole fraction of B in the vapor produced when a mixture of 0.70 mole fraction of A and 0.30 mole fraction of B bols Figure < 1 of 2 > Express the mole fraction numerically using two significant figures. ► View Available Hints) Liquid per reglen Belling point 80 AE ROE? 38 X10.7 Submit Previous Answers X Incorrect; Try Again; 2 attempts remaining sugar and stolp a r and salt sollpa Show all This type of He can harm your computer. Do you want to keep sugar-and-salt-soljno anyway 272/2020 DELL

Answer 1

mole fraction of B = no. of moles of B / total no. of moles

no. of moles of B = 0.30

total no. of moles = no. of moles of A + no. of moles of B

= 0.70 + 0.30 = 1.00

mole fraction of B = 0.30 / 1.00 = 0.3 ( upto 2 significat figures)

hence we calculated mole fraction of B by using formula and calculatef as o. 30.mole fraction has no units as it is ratio of no. of moles of B to total no. of moles.