Explain why clouds are generally observed to form only in the troposphere?

How many moles of air are there in a human lung with a volume of 2.4 l at stp? explain your answer

Which statement correctly describes the phosphate ion, ? it is composed of one phosphorus atom and four oxygen atoms covalently bonded together, and there is a –3 charge distributed over the entire ion. it is composed of one phosphorus atom and four oxygen atoms covalently bonded together, and there is a –3 charge on the phosphorus atom. it is composed of one phosphorus atom and four oxygen atoms ionically bonded together, and there is a –3 charge distributed over the entire ion. it is composed of one phosphorus atom and four oxygen atoms ionically bonded together, and there is a –3 charge on the phosphorus atom.

Which scientists contributed to the determination of how cfcs in clouds in the upper atmosphere could destroy ozone molecules