A liquid has an enthalpy of vaporization of 31 kJ/mol. At 273 K it has a vapor pressure of 104 mm Hg. What is the normal boiling point of this liquid? (R = 8.3145 J/K· mol)

Predict which of the following compounds would have the highest boiling point:

Which of the following substances have London Dispersion Forces of attraction? I. He II. CH4 III. H2O

Which of the following processes is endothermic?

Which liquid would have the highest viscosity at room temperature?

A metal crystallizes in a face-centered cubic lattice. The radius of the atom is 198 pm and the density of the element is 6.5700000000000003 g/cm3. What is the identity of the metal?

At what angle are x-rays with a wavelength of 175 pm diffracted by layers of atoms that are 353 pm apart? (Assume n = 1)

Calculate the lattice energy of NaBr(s), given the following thermochemical equations, where IE and EA are ionization energy and electron affinity, respectively. Na(s) → Na(g) ΔH°sublimation = +107 kJ Na(g) → Na+(g) + e– IE = +496 kJ 1/2 Br2(g) → Br(g) ΔHƒ° = +112 kJ Br(g) + e– → Br–(g) EA = –325 kJ Na(s) + 1/2 Br2(g) → NaBr(s) ΔHƒ° = –361 kJ

The metal cesium crystallizes in a body-centered cubic lattice. If the density of cesium is 1.88 g/cm3, what is the unit cell volume?

According to band theory, an insulator is a material which has a(an) _____ valence band, a(an) _____ conduction band, and a _____ gap between them.

Which equation represents the number of atoms in a primitive cubic unit cell?

An unknown white solid was found to have a melting point of 150oC. It is soluble in water, but it is a poor conductor in aqueous solution. Which of the following substances is the most likely?