Question 7 of 10 The diagram shows a cáright referfrocza dlane mitor which two
angles are equal by the law of reflectors
2
3
O Angle 1 - angle 2
O B. Eagle 2- angie3
O C. Angle 2= angle 4
O D. Angle 1 - angle 3

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)

Consider the elements bromine and chlorine; which elements has a larger ionic radius ?

Calculate the number of moles of ethane in 100 grams