A medical x ray machine has a wavelength of 2.10 x 10^-11m. What is the frequency (in Hz) and energy (in J) of this wave?

How can you use chemical equations to predict the products of the reaction you can carry out?

Compare the equilibrium constants for the systems shown in the table. which favors products the most? which favors products the least? rank these systems in order from most to least in terms of favoring products rather than reactants. d > b > a > c c > a > b > d b > c > d > a a > d > c > b

Which is the solubility product expression for caf2(s)?  [ca2+]/[f–]2  [ca2+][f2–]  [ca]+[f]2  [ca2+][f–]2