Answer:

look at the picture above
 
        
                    
             
        
        
        
Answer:
127529 KJ
Explanation:
Since 1gallon = 3.78 L= 3780 ml
The density of C8H18= 0.703 g/mL
Density = mass/volume
Mass= Density × volume
Mass= 0.703 g/mL × 3780 ml
Mass= 2657.34 g
Molar mass of C8H18= 114 g/mol
Number of moles= mass/molar mass
Number of moles= 2657.34/114
Number of moles= 23.31 moles
Since 1 mole evolved=5471 kJ 
23.31 moles = 5471 kJ × 23.31 = 127529 KJ
 
        
             
        
        
        
I think it is B silicon and iron.
        
             
        
        
        
Answer:
The electrons are found on the outer shell of the atom.
Explanation:
 
        
             
        
        
        
Answer:
0.12 mL of the epinephrine solution.
Explanation:
We have: 
A bottle of epinephrine labeled 1 mg in 1 mL of solution, 
We need to prepare:
An injection of 0.12 mg of epinephrine
Hence:

Therefore, to prepare an injection of 0.12 mg of epinephrine labeled 1 mg in 1 mL we need to inject 0.12 mL of the epinephrine solution.           
I hope it helps you!