You perform combustion analysis on 255 mg of a molecule that contains only c, h, and o, and you find that 561 mg co2 is produced, along with 306 mg h2o. if the molecule contains only c, h, and o, what is the emperical formula? if the molar mass of the compound is 180g/mol, what is the molecular formula of the compound?

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)

Gymnast always perform on padded mats. how does the mats protect the gymnast

Which type of fossil does this image depict?