Answer:
hydrogen atom and oxygen atom
 
        
             
        
        
        
Answer: The moles of carbon needed will be, 13.8 moles
Explanation: Moles of  = 5.52 mole
Now we have to calculate to moles of carbon.
The given balanced chemical reaction is,
From the balanced chemical reaction, we conclude that
As, 2 mole of  react to give 5 moles of carbon
So, 5.52 mole of  react to give  moles of carbon
Therefore, the moles of carbon needed will be, 13.8 moles
 
        
                    
             
        
        
        
x=3
Use the pythagorean theorem:
a^2 + b^2 = c^2
4^2 + x^2 = 5^2
16 + x^2 = 25
x^2 = 25-16
x^2 = 9
√x^2 = √9
x = 3
 
        
             
        
        
        
Answer: by boiling the water to have it evaporate in to water vaper
 
Explanation:
 
        
             
        
        
        
Answer:
0.0890 M
Explanation:
Since the concentration of KCl is irrelevant in this case, the concentration of Na2S2O3 can be determined using a simple dilution equation:
C1V1 = C2V2, where C1 = 0.149 M, V1 = 150 mL, V2 = 250 mL
C2 = 0.149 x 150/250 
                     = 0.089 M
To determine the concentration of  S2O32- (aq), consider the equation:

The concentration of Na2S2O3 and S2O32- (aq) is 1:1
Hence, the concentration in molarity of S2O32- (aq) is 0.089 M.
To 3 significant figures = 0.0890 M