I think that it might represent Velocity
        
             
        
        
        
Answer: 
The answer is C. Coil
Explanation:
Water is a renewable resource. So is sunlight. Coil is not. I know because it is a fossil fuel. Coil takes millions of years to form in the earth. Therefore, it is not a renewable resource. 
 
        
                    
             
        
        
        
Answer:
12
Explanation:
Boyles law
P1 (.36)
V1(28.3)
P2(.85)
V2(?) 
P1*V1=P2*V2
plug it in, and you get 12
 
        
             
        
        
        
Answer:
Theoretical yield of HI is 512 g.
The percent yield for this reaction is 25%.
Explanation:

Moles of hydrogen gas = 3.0 moles
Moles of iodine gas  = 2.0 moles
According to reaction 1 mol of hydrogen gas reacts with 1 mol of iodine gas.
Then 3.0 moles of hydrogen gas reacts with 3.0 mol of iodine gas. But there are 2.0 moles of iodine gas. Hence,Iodine is a limiting reagent. The production of HI will depend upon iodine gas moles.
According to reaction , 1 mol of iodine gas gives 2 moles of HI.
Then 2 moles of iodine gas will give:
 of HI
 of HI
Theoretically we will get 4 moles of HI. 
Theoretical yield of HI =  4 mol × 128 g/mol= 512 g
Experimental yield of HI = 1.0 mol 
= 1 mol × 128 g/mol= 128 g


The percent yield for this reaction is 25%.