Answer:
The answer to your question is:
Explanation:
Data
carbon        7.3%          =     7.3g
hydrogen    4.5%         =      4.5g
oxygen       36.4%         =     36.4 g
nitrogen     31.8%         =     31.8 g
Now 
For carbon 
                     12 g --------------------1 mol
                     7.3 g     -------------     x
                        x = 7.3/12 = 0.608 mol
 For hydrogen 
                  1 g   --------------------  1 mol
                  4.5 g  ------------------    x
                    x = 4.5 mol
For oxygen
              16 g ------------------- 1 mol
              36.4 g ----------------    x
              x = 2.28 mol
For nitrogen
               14 g   ----------------   1 mol
               31.8 g ---------------    x
              x = 2.27 mol
Now divide by the lowest result, the is 0.608 from carbon
carbon              0.608/0.608 = 1
hydrogen           4.5/ 0.608 = 7.4
oxygen              2.28/0.608 = 3.75
nitrogen             2.27/0.608 = 3.73
 Empirical formula = CH₇O₄N₄
       
 
        
             
        
        
        
<span>(3) amina ........................</span>
        
             
        
        
        
Number 1 is 4.875 Number 2 is 3.47 repeating
 
        
             
        
        
        
if your serious about this question then it is 5
 
        
                    
             
        
        
        
It’s atomic mass is what the number means.