Compounds a and b are isomers having molecular formula c5h12. Heating a with cl2 gives a single product of monohalogenation

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)

What pressure will be exerted by 0.675 moles of a gas at 25*c if it is in a 0.750-l container?

Fred is studying a substance that is made out of only one element. this means that