How many atoms of argon gas are contained in a 336 liter sample of argon gas at STP?

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.

Which best describes why nh4+ can form an ionic bond with ci-?

In 2002, the rare earth elements mine in mountain pass, california was closed because