The properties of substances a, b and c are as follows: material a is non-volatile and does not break down. material b is volatile with a vapor pressure of 30 ° c equal to 300 torr.
the volatile c substance has a vapor pressure of 30 ° c equal to 200 torr at 30 ° c. prepare the solution by mixing the following substances.

bottle 1 mix substance a and substance b. the solution has a vapor pressure of 270 torr.

bottle 2 mix substance b with substance c and the mole fraction of substance b in bottle 2 is half of the mole fraction of substance b in bottle 1. calculate
vapor pressure above solution in bottle 2