Answer:
I think they are all correct
 
        
             
        
        
        
The correct answer is  hydrogen<span>, and </span>oxygen<span>. </span>
        
                    
             
        
        
        
If the temperature of a liquid-vapor system at equilibrium increases, it will shift towards the vapor phase, assuming that the pressure remains equal. The concentration of vapor will also increase relative to the concentration of liquid in the system. Thus, the new equilibrium condition will have more vapor than liquid. 
        
             
        
        
        
        
1 mole ------------ 6.02 x10²³ molecules
? mole ----------- 1.505 x10²³ molecules
1.505x10²³ / 6.02x10²³ => 0.25 moles
hope this helps!