Which statements describe how chemical formulas, such as h2o, represent compounds? check all that apply. they show the types of molecules that make up an atom. they show the elements that make up a compound. they show the three-dimensional shape of a molecule. they show the types of atoms that make up a molecule. they show the number of each type of atom in a molecule.

Two loudspeakers, 5.5 m apart and facing each other, play identical sounds of the same frequency. you stand halfway between them, where there is a maximum of sound intensity. moving from this point toward one of the speakers, you encounter a minimum of sound intensity when you have moved 0.33 m . assume the speed of sound is 340 m/s.part a) what is the frequency of the sound? part b) if the frequency is then increased while you remain 0.21 m from the center, what is the first frequency for which that location will be a maximum of sound intensity? express your answer to two significant figures and include the appropriate units.