Answer:
This one is easy. It's the Avogadros' Hypothesis or Avogadros' Law, where the equal volumes of gases in SAME conditions have an equal amount of molecules!
 
        
                    
             
        
        
        
It would be joule. I hope this helps!
        
                    
             
        
        
        
Answer:
1 oxygen 1 hydrogen hydrogen peroxide I think 
 
        
             
        
        
        
A covalent bond is formed between H and Br 
The structure of HBr is as follows 
H —Br
Formal charge for atoms are the charges for individual atoms in compounds.
Formal charge can be calculated as follows ;
Formal charge of atom = number of valence electrons -( number of bonds + number of lone pair electrons)
H has 1 valence electron, 1 bond and 0 number of lone pair electrons 
Formal charge of H = 1 -1 -0 = 0 
H has 0 charge