What is the total number of moles of hydrogen atoms contained in 1 mole of (NH4)2C20?

Explain why scientists use shared characteristics to make cladograms.

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.

An observation that requires measurement is called quantitative observable or qualitative