3. How many moles of bromine gas would occupy a volume of 20 L at a pressure of.90 atm and a temperature of 90°C?

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)

How many moles of potassium hydroxide are needed to completely react with 2.94 moles of aluminum sulfate

What are some natural measures of time