An acid is added to water, and a new equilibrium is established. what is the system after the acid is added? a. ph w = 1 x 10-14 b. ph w -14 c. ph > poh and kw = 1 x 10-14 d. ph > poh and kw > 1 x 10-14

If 200.0g of copper(ll) sulfate react with an excess of zinc metal, what is the theoretical yield of copper

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)

This large tectonic plate is bounded on three sides by whats know as the ring of fire. what is the name of this tectonic plate? a) pacific plate b) eurasian plate c) north american plate d) indo- australian plate plz it's science but there's no option for science so i picked chemistry