Mixture containing 50 grams of carbon and 75 grams of oxygen is sealed in a flask. the total mass of the system is 225 grams. the flask is heated to cause the carbon and oxygen to react. the sealed flask is massed. what is the mass of the sealed flask?

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)

At 300 mm hg, a gas has a volume of 380 l, what is the volume at standard pressure

Why is retrograde motion an apparent motion