2. If I mix 3.0 mol of N2(g), 2.0 mol of Cl2(g), 4.0 mol of O2(g) and 1.0 mol of H2(g), what is the mole fraction of O2(g)? If the total pressure is 2.00 atm, what is the partial pressure of O2(g)? (Hint - the answer for mole fraction of O2(g) and the answer for partial pressure of O2(g), both add to give 1.2, if we ignore units) Search entries or author

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 piece of equipment would me most useful for measuring the volume of some water? a. pan balance b. graduated cylinder c. tweezers d. flask quick

Three alkali metals in group 1 are a. calcium, strontium, barium b. boron, aluminum, gallium c. sodium, potassium, rubidium d. fluorine, iodine, chlorine