the answer is in the picture
 
        
                    
             
        
        
        
Answer:
95% Copper and 5% Zinc
Explanation:
Easy stuff read in the chemistry book...
 
        
             
        
        
        
Answer:Na
Explanation:its not in group 3 to 13 hope this helps god bless
 
        
             
        
        
        
<h3>
Answer:</h3>
 2.47 × 10^24 molecules
<h3>
Explanation:</h3>
One mole of a compound contains molecules equivalent to the Avogadro's number, 6.022 × 10^23. 
That is, 1 mole of a compound =  6.022 × 10^23 molecules
Therefore,
1 mole of Na₂CO₃ = 6.022 × 10^23 molecules
Thus, we can calculate the number of molecules in 4.1 moles of Na₂CO₃
we get,
  = 4.1 moles × 6.022 × 10^23 molecules
  = 2.47 × 10^24 molecules
Hence, 4.1 moles of Na₂CO₃ contains 2.47 × 10^24 molecules
 
        
        
        
To get the number of liters of water vapor produced from the combustion of methane gas, we just need the stoichiometric ratio of water to methane which is 2:1. So the number of liters of water vapor from 13.3 liters of methane is 26.6 liters.