(a)The change in Gibbs free energy for the reaction has been 2.6 kJ/mol.
(b) The change in Gibbs free energy for the reaction has been -49.3 kJ/mol.
(c) The change in Gibbs free energy for the reaction has been 91.38 kJ/mol.
 
        
             
        
        
        
When the little fish die they sink to the bottom, and after time the skeletons build up on top of each other. 
        
                    
             
        
        
        
Answer: A, 1.3*1020, 1326
A. 1326
B. 2960.9
C. 9804
D. 8559.6
        
                    
             
        
        
        
Answer:
PCl₅ because a subscript indicates 5 chlorine atoms.
Explanation:
As the name suggests, phosphorous pentachloride contains 5 chlorine atoms as penta means five and phosphorous means P atoms.
 
        
                    
             
        
        
        
Answer:
6 elements.
Explanation:
99.9% by weight of most living things is made of the six elements: hydrogen, carbon, nitrogen, oxygen, phosphorus, and sulfur (backwards using just the letter abbreviations this spells SPONCH).