What is the oh in a solution made by adding 0.060 mole of calcium oxide to 500.0ml

If you want to change the pitch of a sound, you have to change the question 7 options: volume speed amplitude frequency

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)

2. how is heavy water different from normal water