It’s b for sure that’s the answer
        
                    
             
        
        
        
Molar mass of N2 = 28
Moles of N2 = 25 / 28 = 0.89
So, moles of NH3 produce = 2 x 0.89 = 1.78 
Note: H2 is in excess. so no need to care about it. 
        
             
        
        
        
Answer:
4 atmospheric pressure is needed to get a volume of 25 litres
 
        
             
        
        
        
➡ ANSWER  
☑ <em><u>C</u></em><em><u>.</u></em><em><u> </u></em><em><u>3.5 105</u></em><em><u> </u></em><em><u>Hz</u></em>