Given that the ionization of sodium is 496 kJ/mol and the electron affinity of chlorine (strictly defined as Clk à Cl + ek ) is + 349 kJ molcalculate the dissociation energy of NaCl. Assume the interionic distance to be 2.18 Angstroms.

Determine the wavelength of the light absorbed when an electron in a hydrogen atom makes a transition from an orbital in the n=3 level to an orbital in the n=7 level.

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.

What is the most important factor in determining climates.