Question to pomis) A metal tank contains four gases: oxygen, helium, argon, and nitrogen. If the partial pressures of the three gases in the tank
are 35 atm of O2, 5 atm of N2, and 25 atm of He and the total pressure is 66 atm, what is the partial pressure of argon
inside of the tank?

What can be added to the examples section of each circle? endothermic: ice melting into water, and a heat pack becoming warm exothermic: a glow stick glowing, and fireworks exploding endothermic: ice melting into water, and an instant ice pack turning cold exothermic: fireworks exploding, and gasoline burning endothermic: a glow stick glowing, and a heat pack becoming warm exothermic: an instant ice pack turning cold, and ice melting into water endothermic: gasoline burning, and an instant ice pack turning cold exothermic: ice melting into water, and an instant ice pack turning cold

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

It is important to wear proper protective equipment in lab even when not actively performing experiments because accidents can affect any researcher, even one not working on an experiment. select the best answer from the choices provided