Answer
D
Explanation:
They take up usable forms of nitrogen found in soil 
  
        
                    
             
        
        
        
Answer:
they both have 4 sig figs:)
Explanation:
 
        
             
        
        
        
6 is the fourth significant figures
if the number behind it is 5 or more then 5, you must add 1 to the number and ALL the number behind it will turn into 0
so that the answer is 42560 
 
        
             
        
        
        
The answer is C. Life
Hope this helps! :)
        
             
        
        
        
Answer:
Explanation:
The given pH = 8.55
Unknown: 
[H₃O⁺] = ? 
[OH⁻] = ?
In order to find these unknowns we must first establish some relationship. 
                       pH = -log[H₃O⁺]
                    8.55 = -log[H₃O⁺]
                     [H₃O⁺] = inverse log₁₀(-8.55) = 2.82 x 10⁻⁹moldm⁻³
To find the [OH⁻], 
                      pH + pOH = 14
                                pOH = 14 - pH = 14 - 8.55
                                 pOH = 5.45
               pOH = -log[OH⁻]
                [OH⁻] = inverse log₁₀ (-5.45) = 3.55 x 10⁻⁶moldm⁻³
The solution is basic because it has more concentration of OH⁻ ions compared to H⁺ ions.