1. Refer to the chart below on physical properties of matter. Answer the questions and relate the intermolecular forces present among the species to explain the different properties exhibited by the substances. Melting and Boiling Points Molar Mass, g/mol Substance Melting Point, K Boiling Point, K Fluorine (F2) 38 53 85 Bromine (Br2) 160 266 332 Astatine (At2) 420 575 610 a. Which substance has the highest melting and boiling points? b. What intermolecular forces of interactions are present in each of the substances? c. How do the intermolecular forces present relate to the size of the substance?

Use the phase diagram of Substance X below to find the melting point of X when the pressure above the solid is 10. atm. لالا pressure (atm) 32. Doc 16. solid 100 liquid 200 gas 300 temperature (K) Note: your answer must be within 12.5 °C of the exact answer to be graded correct.

Each Phase of matter can be described according to the relative amount of attractive intermolecular forces (IF) holding the molecules together compared to the kinetic energy (KE) of those molecules. Drag each of the following phases of matter to the proper description of its intermolecular forces and kinetic energy of molecules. N Mi 2 1. # Wa # (2 There are negligible attractive forces with a high degree of kinetic energy. Attractive forces are present. However, kinetic energy is slightly greater than those attractive forces. Attractive forces among particles are much greater than the kinetic energy of the particles. ******** SOLID LIQUID GAS

What are adhesive forces?   a)The intermolecular attraction forces that make molecules of one substance stick to surfaces with which they come into contact. b)The forces that make some molecules denser than others. c)The forces that attract positive and negative particles to each other. d)The intermolecular attraction forces that make molecules of one substance repel the surfaces with which they come into contact.

Use the phase diagram of Substance X below to find the boiling point of X when the pressure on the liquid is 3.7 atm. pressure (atm) 0- 8 solid liquid gas 100 temperature (K) 200 Note: your answer must be within 12.5 °C of the exact answer to be graded correct. ☐ °C G

explaination for this and the answer thank you

Use the phase diagram of Substance X below to find the melting point of X when the pressure above the solid is 1.3 atm. کارا pressure (atm) solid ]°C 200 liquid gas temperature (K) Note: your answer must be within 20 °C of the exact answer to be graded correct. X 400

When does a substance exists in a condensed phase?   a.   When its molecules have enough average kinetic energy to overcome intermolecular forces of attraction.   b. When its molecules have too little average kinetic energy to overcome intermolecular forces of repulsion. c.   When its molecules have too little average kinetic energy to overcome intermolecular forces of attraction.

Difluoroethene has two isomers with very different properties despite having the same chemical formula. Based on the chemical structure shown for the first isomer, what intermolecular forces are present in this molecule?

The pressure above a pure sample of solid Substance X at -142. °C is raised. At what pressure will the sample melt? Use the phase diagram of X below to find your answer. بالا pressure (atm) 0 0. atm solid liquid 200 temperature (K) Note: your answer must be within 0.125 atm of the exact answer to be graded correct. gas X 400