Answer:
Electrons 
Explanation:
Because the nucleas is In the middle and the Electrons surround it 
 
        
             
        
        
        
Answer:
 I think its b
Explanation:
but I wouldn't depend on this answer
 
        
                    
             
        
        
        
Answer: 
5,250g
Explanation:
Density = Mass / Volume
*Note: mass = x
1.50g/mL = x / 3500mL
multiply 3500mL on both sides
1.50g/mL * 3500mL = 3500mL(x) / 3500mL
cancel units
x = 5250g
 
        
             
        
        
        
Yes it is polluting the river with everything the manufaturing plant gives off such as the chemicals released in the air
        
             
        
        
        
That would cause the equation to shift right, and make more NH3 and decrease the amount of N2