Consider an ionic compound, MX, composed of generic metal M and generic, gaseous halogen X.
• The enthalpy of formation of MX is AH = -467 kJ/mol.
• The enthalpy of sublimation of Mis AH sub = 135 kJ/mol.
• The ionization energy of Mis IE = 411 kJ/mol.
• The electron affinity of X is AHEA = -339 kJ/mol. (Refer to the hint).
• The bond energy of X, is BE = 241 kJ/mol.
Determine the lattice energy of MX.
AHLattice =
457.5
kJ/mol

The bond energy for the van der waals bond between two helium atoms is 7.9×10−4ev. assuming that the average kinetic energy of a helium atom is (3/2)kbt, at what temperature is the average kinetic energy equal to the bond energy between two helium atoms

In salt water solution,the salt is the blank

Calculate the estimated density of each ball. use the formula d = m/v where d is the density, m is the mass, and v is the volume. record your calculations in table a of your student guide. given that the density of water is 1.0 g/cm3, make a prediction about whether each ball will float in water. record your prediction in table a. what is the estimated density of the table tennis ball? record your answer to the nearest hundredth