Answer:
(NH4)3PO4 is 28.2 % N , 8.1% H, 20.8 % P and 43.0 % O by mass.
Explanation:
the formula In chemistry, the mass fraction of a substance within a mixture is the ratio w_{i} of the mass m_{i} of that substance to the total mass {\displaystyle m_{\text{tot}}} of the mixture. Expressed as a formula, the mass fraction is: {\displaystyle w_{i}={\frac {m_{i}}{m_{\text{tot}}}}.} 
 
        
             
        
        
        
O is what should go in the blank. O stands for Oxygen. 
        
             
        
        
        
Answer:
Trade winds
Explanation:
I am not sure
        
             
        
        
        
Answer:
The unknown amount of potassium chloride is 13.6 grams.            
  
Explanation:
The reaction of 14 grams of KNO₃ with KCl produces a total mass of 27.6 grams of the products. 
The law of conservation of mass tells us that the total mass of the reactants must be the same that the total mass of the products. So, we can find the mass of KCl as follows:

Where <em>r</em> is for reactants and <em>p </em>is for products



Therefore, the unknown amount of potassium chloride is 13.6 grams.            
I hope it helps you!
 
        
             
        
        
        
This is called a climax community.