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:
NaOH(aq) + HNO3(aq)------>NaNO3(aq) + H2O(l)
Explanation:
A thing to note is that an acid and a base will react to form a metal salt + H2O.
~Hope it helps:).
 
        
             
        
        
        
A) The limiting reactant is Al
b) Br2 is the excess reactant
c) The amount moles of AlBr3 that get produced will be equal to the number of moles of Al to begin with.
d) 0
        
             
        
        
        
Salt dissolving in a glass of water, using electricity to break down water into hydrogen and oxygen, rust forming on an iron fence and gas burning on a stove.