Answer:
34.7mL
Explanation:
First we have to convert our grams of Zinc to moles of zinc so we can relate that number to our chemical equation. 
So: 6.25g Zn x (1 mol / 65.39 g) = 0.0956 mol Zn 
All that was done above was multiplying the grams of zinc by the reciprocal of zincs molar mass so our units would cancel and leave us with moles of zinc. 
So now we need to go to HCl! 
To do that we multiply by the molar coefficients in the chemical equation:

This leaves us with 2(0.0956) = 0.1912 mol HCl 
Now we use the relationship M= moles / volume , to calculate our volume 
Rearranging we get that V = moles / M 
Now we plug in: V = 0.1912 mol HCl / 5.50 M HCl 
V= 0.0347 L 
To change this to milliliters we multiply by 1000 so:
34.7 mL 
 
        
             
        
        
        
most metals conduct electricity and are very dull to the look. most metals are toxic if eaten and are hard. 
aluminum is a type of metal they is softer than the opther and conducts eletricty like a boss. 
nickel on the opther hand is also a metal but does not conduct a lot of electricy. 
metals can be bent and others can break, 
 
        
                    
             
        
        
        
Answer:
20.27 mol
Explanation:
454 L x (1 mol/22.4 L) = 20.27 mol