Which statement correctly describes compounds? Compounds cannot be broken down into simpler substances by chemical means.
Each compound is composed of one type of molecule.
Compounds can be broken down into simpler substances by physical means.
Each compound is composed of one type of atom.

Asample of silver (with work function ? = 4.52 ev) is exposed to an ultraviolet light source (? = 200 nm), which results in the ejection of photoelectrons. what changes will be observed if: silver is replaced with copper (? = 5.10 ev) more photoelectrons ejected no photoelectrons are emitted fewer photoelectrons ejected more energetic photoelectrons (on average) less energetic photoelectrons (on average)

How many miles of water are produced if 5.43 mol pbo2 are consumed

What royal scientist used the 29th day of frozen vapor to encounter elements for mastering new culinary creations?