How many moles of ammonia would be required to react exactly with 0.824 moles of copper(II) oxide in the following chemical reaction?
2 NH3(g) + 3 Cuo(s) — 3 Cu(s) + N2(g) + 3 H2O(g)

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)

Each pair of clay balls represents to planetesimals if each plane test molluscum pound of the same material and is separated by the same distance which pair experiences the greatest gravitational attraction

Draw the skeletal structures of two different molecules that are each made of 5 carbon atoms and 12 hydrogen atoms.