A. C,H,N| В. СН-N С. СН Р The glass capillary tubes are composed of silicon dioxide, Si O, is touched to the surface of a liquid sample of each pure compound A, B, B. Si 02 has a slight dipole moment and the lone pairs of the oxygen atoms can participate in hydrogen bonding interactions with other substances. 1. Explain why CH,N have the strongest cohesive and adhesive forces to rise up the capillary tube to a highest height. Explain your answer referencing intermolecular, adhesive, and cohesive forces.

The change in enthalpy, AH, for dissolving toluene (C,H,) in water is approximately zero. Do you predict toluene will dissolve in water? Why or why not? O Toluene will dissolve in water because LDFs and dipole-induced dipole interactions will form between them. O Toluene will dissolve in water because there are more arrangements for the toluene molecules when mixed with water. O Toluene will not dissolve in water because toluene is non-polar and water is polar. Toluene will not dissolve in water because there would be fewer arrangements for the water molecules if it were to dissolve. O O Toluene will not dissolve in water because there are no attractive forces that exist between toluene and water.

In which of the following liquids would London Forces be the major intermolecular force?   a. H2   b. CCl4   c. CO2   d. All of These

The vapor pressure of pure water at 35°C is 42.2 mm Hg. What is the vapor pressure of a mixture of 7.5 g sucrose (C12H22011) and 42.5 g water? a. 21.8 mm Hg O b. 41.8 mm Hg O c. 35.9 mm Hg d. 40.6 mm Hg O e. 7.45 mm Hg

In what order should the boiling points of the substances MgO, Ne, and H2O decrease? Ne > water > MgO MgO > Ne > water Ne > MgO > water  water > MgO > Ne MgO > water > Ne My initial answer was the first one (Ne > water > MgO) but it turned out wrong, perhaps was it supposed to be the last choice?

24 Feb 2021 2odium chloride (NaCI) is completely saluble in water. What is responsible for its solubility in water? A. Na+ and Clions are favorable sites for H-bonding to torm. В. The presence of charged ends in NaCl enables dipole-dipole interaction with water. e lons in Načl participate in on-induced dipole attractions with water. C. D. London dispersion forces in NaCl predominate leading to strong dipole interactions with water. 5. Kenon (Xe) has a greater atomic weight than Neon (Ne). Xe has 131.3 amu while Ne has 20.2 amu, The melting points are 166.1K and 27.3K, respectively. How do intermolecular forces account for the difference? A. Dipole- dipole interaction is greater in Xe than Ne so more energy is needed to break the bonds. B. H-bonding is greater for substances with higher atomic weight so greater energy is needed to change Xe to vapor. C. Atomic weight increases the chance of lesser dispersion forces so greater energy is needed to separate Xe atoms to change to vapor. D.…

The vapor of liquid bismuth is 400 mm Hg at 1.72x10^3 K. Assuming that it’s molar heat of vaporization is constant at 184 kj/mol, the vapor pressure of liquid Bi is ____ mm Hg at a temperature of 1.70x10^3. The normal boiling point of liquid ethane thiol is 308 K. Assuming that its molar heat of vaporization is constant at 26.7 kj/mol, the boiling pint of C2H5SH when the external pressure is 0.753 atm is ____ K.

answer number 10.