What is the pressure of 4 moles of helium in a 50 L tank at 308 K? Use PV = nRT.
A. 0.13 atm
B. 24.64 atm
C. 2.02 atm
O D. 0.51 atm

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 does a hydroelectric power plant converts energy into energy.

In a ball-and-stick molecular model, what do the sticks represent?