Answer:
2K + 2H2O → H2 + 2KOH 
Explanation:
Find how many atoms you have on both sides then add 2 to both sides. 
Reactant:       Products:
K: 1+1=2                K: 1+1=2
H: 2+2=4             H: 3+1=4
O: 1+1=2                O: 1+1=2 
Therefore it is balanced. Hope this helps 
 
        
             
        
        
        
Answer:
1. Newton's third law of motion
2. Unbalanced
3. Action
 
        
                    
             
        
        
        
Answer:
A = 1,13x10¹⁰
Ea = 16,7 kJ/mol
Explanation:
Using Arrhenius law:
ln k = -Ea/R × 1/T + ln(A)
You can graph ln rate constant in x vs 1/T in y to obtain slope: -Ea/R and intercept is ln(A).
Using the values you will obtain:
y = -2006,9 x +23,147
As R = 8,314472x10⁻³ kJ/molK:
-Ea/8,314472x10⁻³ kJ/molK = -2006,9 K⁻¹
<em>Ea = 16,7 kJ/mol</em>
Pre-exponential factor is:
ln A = 23,147
A = e^23,147
<em>A = 1,13x10¹⁰</em>
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I hope it helps!