Which of the following arrangements of electrons represent Potassium? * a. 2,6,3,8

b. 2,7,8,2

c. 2,8,8,1

d. 2,9,7,1​

Jessica is traveling from miami, florida, to chicago, illinois. using the map, tell one way the land will change during the second half of her trip.

The identities of substances are the same before and after which type of change

High-pressure liquid chromatography (hplc) is a method used in chemistry and biochemistry to purify chemical substances. the pressures used in this procedure range from around 500 kilopascals (500,000 pa) to about 60,000 kpa (60,000,000 pa). it is often convenient to know the pressure in torr. if an hplc procedure is running at a pressure of 1.03×108 pa , what is its running pressure in torr?