1. if there are 2 grams of product produced by a chemical reaction, how many grams of reactant were consumed? a. 0 grams b. 1 gram c. 2 grams

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)

Which of the following represents the ester functional group? a. -coo- b. -cho c. -cooh d. c=o

Describe what happens to the molecules as water goes from ice to liquid to vapor. be sure to explain what happens to the temperature during the phase changes.