Which type of 'wave interaction' is a result of electromagnetic waves entering a medium and staying within it?

A) reflection
B) refraction
C) diffraction
D) absorption
E) scattering

Which of the following is true for the actual yield of a reaction? it is always calculated as a ratio. it is the yield from the excess reactant. it is the yield from the limiting reactant. it is always less than the theoretical yield.

Which class of molecules functions as chemical signals? hormones water carbohydrates proteins

Identify arrows pointing to bonding electrons. done h-0-0-h ) intro