PLEASE HELP , 50 points!

Write the electron configuration of a -2 ion with 16 protons.

Consider the nuclear equation below. 239/94 pu—-> x+ 4/2 he. what is x?

If you burn 46.6 g of hydrogen and produce 416 g of water, how much oxygen reacted

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?