How does a polyatomic anion differ from a monatomic anion?

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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 moles of carbon dioxide will form if 2.5 moles of c3h8 is burned

Drug abuse will not lead to physical and psychological dependence. true or false ?