What type of collision is occurring between these gas particles? elastic inelastic repulsive attractive

What layer of the atmosphere is directly above the troposphere?

Which fact represents evidence for the big bang theory?

The msds for glacial acetic acid says that it is a flammable liquid that can severely burn any human tissue it comes in contact with. it reacts with bases, various metals, and strong oxidizing agents. its vapors can form explosive mixtures with air.