Which combination of ion charge and ion size produces the greatest lattice enthalpy?
a. high charge, large size
b. high charge, small size
c. low charge, small size
d. low charge, large size

Calculate the molar mass of aluminum oxide (al2o3). express your answer to four significant figures.

This flow chart shows the amount of energy that is emitted by each type of light. ultraviolet > blue light > yellow light > red light (maximum energy) (minimum energy) in an experiment, shining which type of light on a strip of metal would be least likely to produce the photoelectric effect? ultraviolet light dim blue light bright red light bright yellow light

The volume of helium in a blimp is 6.28 x 10^9 millimeters. the density of helium in the blimp is .1786 kilogram/meter^3. find the mass of the helium in the blimp.