Which of the following statements are true? Select all that apply. O For molecules with varying molecular weights, the dispersion forces may not become stronger as the molecules become more polarizable. O The smaller the atom, the less polarizable it is. O In terms of the total attractive forces for a given substance, the contribution of dipole-dipole interactions, when present, are always larger than the contributions of dispersion forces. O For the halogens, the dispersion forces increase while the boiling points decrease as you go down the column in the periodic table from F2 to I2 O All other factors being the same, dispersion forces between linear molecules are greater than dispersion forces between molecules whose shapes are nearly spherical.

Question 11 of 20 Which statement describes why the viscosity of maple syrup is higher than that of orange juice? O A. The molecules that make up maple syrup are negative ions, while the molecules that make up orange juice are positive ions. O B. The molecules that make up maple syrup have a harder time moving past one another because they are smaller than the molecules that make up orange juice. C. The molecules that make up maple syrup are positive ions, while the molecules that make up orange juice are negative ions. D. The molecules that make up maple syrup have a harder time moving past one another because they are larger than the molecules that make up orange juice.

Consider two molecular compounds: carbon monoxide (CO) and nitrogen (N2). Which statement below is TRUE? O Nitrogen (N2) has the higher boiling point because it has greater dispersion forces. O CO has the higher boiling point because it experiences dipole-dipole forces. O Both CO and N2 must have the same boiling point, since their molar masses are similar. O N2 has the higher boiling point because it experiences dipole-dipole forces.

What main type of forces must be overcome between I2 molecules when solid I2 dissolves in ethanol, С Н; ОН ? O hydrogen bonding O dipole-dipole O dipole-induced dipole O induced dipole-induced dipole

Order the following in terms of increasing boiling point, CH3F, HOCl, CH3I, I2. Use your knowledge of intermolecular forces to explain your reasoning

Indicate what the strongest intermolecular interaction (dispersion forces, dipole-dipole interaction, hydrogen bonding) would be for each molecule as a pure substance.

In a liquid, the tendency of liquids to minimize their surface area is called O capillary action O dipole - dipole forces O Surface tension O viscosity OH- bonding

Choose the answer which presents the chemical formulas for two substances in order of decreasing melting point (highest melting point first) and gives a valid reason for this order. a) Al > H2O due stronger dispersion forces in Al than in H2O. b) Xe > Ar because of the greater atomic mass and stronger dispersion forces of Xe. c) LiF > MgF2 due to lower atomic mass of Li+ than Mg2+. d) PbCl4 > PbO2 due to lower charge on Cl - than O2-. e) XeF4 > CF4 due dipole-dipole forces in XeF4 not present in CF4.

How much heat is required to convert 42.0 g of ethanol at −142 ∘C to the vapor phase at 78 ∘C?