Calcium carbonate decomposes at 1200°c to form carbon dioxide and calcium oxide. If 2.5 liters of carbon dioxide are collected at 1275°c, what will the volume of this gas be after it cools to 25°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)

Smog is the term used to describe the combination of fog and smoke

What is the percent by mass of oxygen in fe2o3