Explain, using prose and any necessary chemical and/or mathematical arguments, why we use (o2 + 3.76 n2) as the chemical makeup of air.

Select each correct answer. more than one answer may be correct. which of the following is a characteristic of unicellular organisms? they can possess tissues and organs. all of their functions are performed by a single cell. they are usually microscopic. each of their cells is specialized to perform a specific function.

About 3% of the water on earth is freshest. only about 40% of that freshwater is available for human use. why is so much freshwater unavailable for human use?

Which diagram represents the phase tha occurs after a solid melts?