Someone help me solve this ASAP . Jimmy has a large 8.00 Leader balloon of helium with 2.55 atm of pressure inside he decides to squeeze it to a volume of 3.50 leaders what is the new pressure inside this balloon

Calculate the energy required to ionize a hydrogen atom to an excited state where the electron is initially in the n = 5 energy level. report your answer in kilojoules

Question 3(multiple choice worth 4 points) (04.04 lc) what does it mean when an element is reduced? it empties a valance shell, reducing its atomic radius. it gains electrons, reducing its overall charge. it increases electronegativity, reducing its ability to bond. it loses electrons, reducing its electron number.

What is the value of the standard enthalpy of formation of an element in its most stable form?