An acetic acid buffer solution is required to have a ph of 5.27. you have a solution that contains 0.01 mol of acetic acid. what molarity of sodium acetate will you need to add to the solution? the pka of acetic acid is 4.74. show all calculations in your answer

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)

Newtons second law deals most cosely with

How many atoms of mg are present in 97.22 grams of mg? 6.022 × 1023 2.408 × 1024 4.818 × 1024 5.855 × 1025