A metal tank contains three gases: oxygen, helium, and nitrogen. If the partial pressures of the three gases in the tank are 35.0 atm of O2, 5.0 atm of N2, and 25.0 atm of He, what is the total pressure inside of the tank?

Which is the layer underground where all empty spaces are filled with a combination of air and water ?

Lewis structure and molecular geometry for nh2cl

Which of the following did jj thompson discover about atoms? a)an atom has an internal structure. b) atoms are tiny indivisible particles. c)electrons orbit the nucleus of an atom. d) the nucleus of an atom contains protons and neutrons.