Answer:
Actually, The Henderson - Hasselbalch equation allows you to calculate the pH of the buffer by using the pKa of the weak acid and the ratio that exists between the concentrations of the weak cid and conjugate base.  The pKa of formic acid is equal to 3.75.  In this case, the pH of the solution will be equal to the acid's pKa .
 
        
             
        
        
        
I just looked it up and I found this:
Polar substances are likely to dissolve in polar solvents 
Hope this helps!
        
             
        
        
        
Answer:
Dia setreoner is free and open source general-purpose diagramming software, developed originally by Alexander Larsson. Dia uses a controlled single document interface.Dia is a diagramming application that can be used to make a large variety of diagrams. Dia is easy to learn and flexible enough to allow power users to create highly customized diagrams.
 
        
             
        
        
        
Answer:

Explanation:
<h3>Chemical Reaction:</h3>

<u>From the reaction, we can say that,</u>
- 1 mole of propane and 5 moles of oxygen produce 4 moles of water and 3 moles of carbon dioxide.
So, to generate 3 mole of carbon dioxide, 5 moles of oxygen are required. (as shown in the chemical reaction!)
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