Asphalt<span>/bitumen is </span>used to make<span> Japan black, a lacquer known especially for its use on iron and steel,</span>
        
             
        
        
        
The answer is A for number 1 and D for 2
        
                    
             
        
        
        
D: The atomic mass number
        
                    
             
        
        
        
Answer: 16.7 gallon
Explanation: 
Given: The car can drive 30.3 miles when 1 gallon of gasoline is used.
Distance covered = 506.3 miles
Thus for 30.3 miles, the amount of gasoline used= 1 gallon
For 506.3 miles, the amount of gasoline used=
Thus the amount of gasoline used is 16.7 gallons.
 
        
                    
             
        
        
        
Activity series of metals: K,Na,Mg,Al,Zn,Fe,Cu,Ag. Metals on the left are more reactive than metals on the right. For example Zn is more reactive than Fe and can displace him. 
Reaction than can occur is: <span>CuSO4(aq) + Fe(s) → FeSO4(aq) + Cu(s).</span>