Two volatile substances, a and b are dissolved in one another and the resulting solution has a vapor pressure of 137 torr. If the mole fraction of b is 0. 230 and the vapor pressure of pure b is 162 torr, what is the vapor pressure of pure a in torr?.

The measure of the angles supplement is 30 more than four times that of its complement. find the measure of the angle described

Explain how earth is like a giant bar magnet. how is our magnetic field made?

Which statements about the two fossil images are correct? 1. cave bears are ancestors of plateosaurus. 2. plateosaurus were present on earth before ostracoderms. 3. ostracoderms were the first to die. 4. plateosaurus died after the ostracoderms. 5. cave bears are the oldest fossils.