You can make a solution saturated by Adding more solute. Hope this helps, good luck. 
        
                    
             
        
        
        
C 
Because I am right
God bless
        
             
        
        
        
Because that solid is frozen liquid, so when it gets heated up, it will melt. Like Ice.
Hope I Helped! :)
        
             
        
        
        
Answer:
it forms :
1. Gold ( Au )
2. Zinc nitrate ( Zn(NO3)2 )
Explanation:
When a chunk of zinc is added to a solution of gold (III) nitrate to extract the gold. The reaction forms Gold and Zinc nitrate .
it's a single displacement reaction,
here's the balanced equation for above reaction :
3 Zn + 2 Au(NO3)3 =》3 Zn(NO3)2 + 2 Au 
 
        
                    
             
        
        
        
Gasoline would be a mixture if I recalled