Answer: Sharp spines and waxy stems
 
        
                    
             
        
        
        
Answer:
The answer is C. 
Explanation:
Mass is converted to the energy binding a nucleus together.
 
        
                    
             
        
        
        
The ideal gas equation is pV = nRT
From that you can derive several equations, depending on which variables are fixed.
1) When n and T are fixed:
pV = nRT = constant
pV = constant => p1 V1 = p2 V2 => p1 / V2 = p2 / V1 ---> Boyle's Law
2) When n and V are constant:
p / T = nR/V = constant
p / T = constant => p1 / T1 = p2 / T2  ----> Gay - Lussac's Law 
3) when n and p are constant
V / T = nR/p = constant    
V / T = constant => V1 / T1 = V2 / T2 ---> Charles' Law
4) When only n is constant
pV / T = nR = constant
pV / T = constant => p1 V1 / T1 = p2 V2 / T2 ----> Combined gas law.
There  you have the four equations that agree with the ideal gas law.   
        
                    
             
        
        
        
C) 3 Moles
This is because of the molecular structure shown in the image