Answer:
C. 3.40 ppm, singlet
Explanation:
Given the information from the question .we have to select the best representation for represents the predicted approximate chemical shift and coupling for hydrogen(s). In this case, there is no neighboring hydrogen .Thus there won’t be any split .the best option answer is C. 3.40 ppm, singlet . Therefore the correct answer or option is C. 3.40 ppm, singlet.
 
        
             
        
        
        
Answer:
it's an indicator that a chemical reaction occurred. 
 
        
             
        
        
        
Answer:
Immiscible 
Explanation: 
Not sure what kind of substance but this is form liquids.
 
        
             
        
        
        
<span>4NH</span>₃<span> + 6NO → 5N</span>₂<span> + 6H</span>₂<span>O
mol of NO  =  </span>
 
                   =  
 
                                     =  0.93 mol
Based on the balance equation mole ratio of NH₃  :  NO  is   4 : 6
                                                                                            =  2 : 3
If mol  of NO  =  0.93 mol
then mol of NH₃ = 
 
                                                     =  0.62 mol
Mass of ammonia =  mol  ×  molar mass          
                             =  0.62 mol   ×  17.03 g/mol 
                             =  10.54 g
Therefore B is the best answer