How many atoms of potassium are needed to combine with one atom of chlorine

If a || b and e || f, what is the value of y ?

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.

How have the greenhouse gasses increased from the year 2000 to 2018