Why is the concentration of helium increased in some gas mixtures that divers breath in order to reduce the partial pressure of oxygen?

Explain how the integumentary system plays a crucial role in the ability to maintain homeoestasis

Label a-f based on the table using c for concentrated and d for dilute

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