Yes the kingdom is more specific
        
             
        
        
        
Acid-base tiltrations has DNA that can help in the process of neutralization. not so sure about it
        
             
        
        
        
In this case, we are going to assume that there are 100 atoms to make things easier. 
Let R% be the abundance of n-15. With this in mind, we calculate the abundance of n-14 to be 100%-R%
14.0031*(100-R)% + 15.001 * R%= 14.00674 
In this case, we can delete or ignore the % sign since we do not want to carry it around, however, we need to keep in mind that the final answer is in %
14.0031*(100-R) + 15.001 * R= 14.00674 
1400.31-14.0031R+15.001R=1400.674
0.9979R=0.364
R=0.3648
Then, the abundance of n-15 is 0.3648%
        
             
        
        
        
Ammonia is the base out of the 4