Explanation:
c. if the vector is oriented at 0° from the X -axis.
 
        
             
        
        
        
the higher concentration of molecules, the faster a reaction can occur
 
        
                    
             
        
        
        
Answer:
B. Same for a chemical family 
 
        
             
        
        
        
The gas planets usually have extremely high gravitational pulls, the surface isn't solid (since its a gas planet), and gas planets are larger than the inner planets. 
<span>Similarities- These planets all have moons and they both revolve around the sun (obviously).
Hope this helps.</span>
        
             
        
        
        
The answer to that will be the Troposphere.