75 g of potassium phosphate is added to water to make a 6.10 m/v% solution. How many mL of water is needed?

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 image is an example of a(n) a) atom. b) compound. c) mixture. d) molecule.

At 450 mm hg a gas has a volume of 760 l, what is its volume at standard pressure