(i)What is the free energy of mixing I g of polystyrene of molar mass M = lif gmol- 1• with I mol of cyclohexane at 34 °C?Note that 34 °C is the 0-temperature for a polystyrene solution in cyclohexane (Flory inter­action parameter x = 1/2). The molar volume of polystyrene is vp, = 9.5 x 104 cm3 mo1- 1, the molar volume of cyclohexane is Vcyc= 108cm3 mol - 1• Assume no volume change upon mixing and assume that the volume of one solvent molecule is the lattice site volume v0.(ii)What does the sign of the free energy of mixing imply about the stability of a homogeneous solution?(iii)Under what conditions does the homogeneous solution spontaneously phase separate by spinodal decomposition?(iv)When is the homogeneous solution metastable?

Juju.01) 5 geologic events a group of students designed an experiment in an ice rink to represent the solar system. the steps of the experiment are listed below. 5: geologic events 1. choose a student to represent the sun. the planets are represented by two tennis balls. 2. ask the student to hold the tennis balls in each palm and spin on the ice with arms stretched out. 3. ask the student to draw in the arms after about 10 spins. 4. observe the student's arms rotate faster when they are closer to the body. 05 geologic events enors) the experiment most likely demonstrates that (2 points) 07 discussion-based sessment/module planets exert gravitational force on the sun the sun exerts gravitational force on the planets 3.07 discussion-based ssessment speed of a planet depends on its distance from the sun new version available! (3.0.119) get it now submit 18.07: module exam description

Acertain atom has 22 protons and 19 electrons. this atom loses an electron. the net charge on the atom is now 4+1+01-4-. if this same atom with 22 protons and 19 electrons were to gain 3 electrons, the net charge on the atom would be 3+2+02-3-.

Organisms are classified as producer or consumers according to the way they ?