Answer:
trans-1,3-pentadiene is more stable than 1,4-pentadiene due to presence of a conjugated double bond.
Explanation:
Here, 
H(hydrogenated pdt.) is same for both 1,4-pentadiene and 1,3-pentadiene as they both produce pentane after hydrogenation
H(diene) depends on stability of diene.
More stable a diene, lesser will be it's H(diene) value (more neagtive).
trans-1,3-pentadiene is more stable than 1,4-pentadiene due to presence of a conjugated double bond.
Hence,  is higher (less negative) for trans-1,3-pentadiene
 is higher (less negative) for trans-1,3-pentadiene
 
        
             
        
        
        
I think it was from los griegos but a long time a go because he was making and experiment with and apple and he notice that he couldn’t cut more so he name it atoms (sorry for my bad English I don’t speak English)
        
             
        
        
        
Answer:
b.)
Explanation:
Because you would have a different weight on the moon because of it's low gravity
 
        
             
        
        
        
The violet light has the shortest wavelength.
 
        
             
        
        
        
Answer:
New volume is 25.0 mL
Explanation:
Let's assume the gas sample behaves ideally.
According to combined gas law for an ideal gas-
                          
where,  and
 and  represent initial and final pressure respectively
 represent initial and final pressure respectively
  and
 and  represent initial and final volume respectively
 represent initial and final volume respectively
 and
 and  represent initial and final temperature (in kelvin) respectively
 represent initial and final temperature (in kelvin) respectively
Here,  ,
,  ,
,  and
 and 
So, 
So, the new volume is 25.0 mL