Answer: Option (d) is the correct answer.
Explanation:
 According to Bronsted-Lowry, species which donate a proton are known as acid. The species which accept a proton are known as a base. 
In the given reaction, acids and bases are as follows.
     HI  +    
  
     +
           +         
  Acid        Base     Conjugate acid   Conjugate base
Therefore, the acid HI loses a proton to form a conjugate base that is  .
. 
Thus, we can conclude that HI and  is an acid conjugate base pair.
 is an acid conjugate base pair.
 
        
                    
             
        
        
        
Answer:r=1.2 d=2.4
Explanation:
Radius is half the diameter and the diameter is 2.4 m
 
        
                    
             
        
        
        
The empirical formula is the lowest reduced ration of the atoms present. In this case, it is P2O5
        
                    
             
        
        
        
  
Air is a mixture of gases (and some dust) because the gases (oxygen, nitrogen, carbon dioxide, etc.) do not combine chemically into other compounds. Just like a mixture of salt & pepper doesn't combine into some other thing.  
The mixture is homogenous if it consists only of gases. If dust is mixed in the mixture is heterogeneous (dust is solid matter, gas is gas) A heterogenous mixture is one of different types of matter.  
Separating one gas from the other is different for each gas and a complicated matter.
 
        
                    
             
        
        
        
I have -12 points thx a lot 
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