Acetaminophen contains 4 elements. There are 20 atoms in its chemical formula. Hydrogen is the most abundant element in this compound. Which of the following chemical formulas represents acetaminophen? *

What happens to energy in an open system?

The diagram shows the structures of horse and cat forelimbs. what does the diagram suggest about the evolutionary relationship between these two mammals? a. they have homologous structures, indicating a common ancestor. b. they have analogous structures, indicating a common ancestor. c. they have homologous structures, indicating that they do not have a common ancestor. d. they have analogous structures, indicating that they do not have a common ancestor.

Why doesn't heat added to water make the tempature rise above 100c