Answer:
C
Explanation:
the rain does help the soli it can make bacteria
 
        
                    
             
        
        
        
The reaction rates of the substances whether disappearance of a reactant or the appearance of a product are related to each other by the chemical reaction. The reaction rates are related as follows:
rate = rHBr / 2 = rBr2 = rH2
rH2 = 0.160 / 2 = 0.08 M/s
        
             
        
        
        
Answer:
Option a: positron emission. 
 
Explanation:
In the transformation we have:
⁶⁷Ga  →  ⁶⁷Zn  
The reaction is:

For Ga to become Zn, the atom nucleus has to lose a proton, so in the given options, the reaction that involves the transformation of a proton is the option a, positron emission. 
In a positron emission, a proton becomes into a neutron and a positron:

Therefore, the correct answer is option a: positron emission.
I hope it helps you!