Answer:

Explanation:
The original equation is:

We notice that:
- we have 1 atom of Fe on the left, and 2 atoms of Fe on the right
- we have 2 atoms of O on the left, and 3 atoms of O on the right
Therefore, the equation is not balanced.
In order to balance it, we can add:
- a coefficient 3 in front of 
- a coefficient 2 in front of 
So we have:

Now the oxygen is balanced, but the iron it not balanced yet, since we have 1 Fe on the left and 4 on the right. Therefore, we should add a coefficient 4 on the Fe on the left:

 
        
                    
             
        
        
        
Gas pressure will also increase then.., if volume is kept constant 
        
             
        
        
        
Answer:
Hello the diagram related to your question is attached below 
answer: a) 851 m/s
              b)  8506.1 secs
Explanation:
calculate the periodic time of the satellite using the equation below 
t =  --  ( 1 )
  --  ( 1 )
where ; R = 6370 km
h = 500 km
g = 9.81 m/s^2 
input given values into equation 1 
t = 5670.75 secs 
next calculate the periodic time taken by the space craft  
<u>a) determine the increase in speed </u>
V = v -  
  
where ; v = 8463 m/s , R = 6370 km, h = 500 km
V = 851 m/s
b) Determine the periodic time for the elliptic orbit 
τ = 
  =  =  8506.1 secs
  =  8506.1 secs
attached below is the remaining part of the detailed solution