Is it true or false for diffusion to work molecules have to travel through water?

Although respiratory organs vary across different organisms, they all contain respiratory surfaces that have a large surface area and are extremely thin. explain why having an extremely thin respiratory surface with a large surface area is advantageous for the process of gas exchange

Classify this reaction: 2al+n2-> aln.

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