9. Which of the following could represent a molecular formula for CH2O? C6H₁2O6
Ο Ο Ο
C4H₃04
de
10
We
TRO
C4H₂O4
18
Ar
04
O
C₂H₂O₂
Kr
aro
54
Ya

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 happened in 2012 and how does it illustrate the importance of understanding the sun and how it works?

Chemical kinetics what was the rate of reaction in trial 3? choose the closest answer.