Answer:
142.82 g
Explanation:
The following data were obtained from the question:
Volume of water = 12 mL 
Volume of water + gold = 19.4 mL
Density of gol= 19.3 g/cm³
Mass of gold =.? 
Next, we shall determine the volume of the gold. This can be obtained as follow:
Volume of water = 12 mL 
Volume of water + gold = 19.4 mL
Volume of gold =.? 
Volume of gold = (Volume of water + gold) – (Volume of water)
Volume of gold = 19.4 – 12
Volume of gold = 7.4 mL
Finally, we shall determine the mass of the gold as follow:
Note: 1 mL is equivalent to 1 cm³
Volume of gold = 7.4 mL
Density of gol= 19.3 g/cm³ = 19.3 g/mL
Mass of gold =? 
Density = mass /volume 
19.3 = mass of gold /7.4
Cross multiply 
Mass of gold = 19.3 × 7.4
Mass of gold = 142.82 g
Therefore, the mass of the gold pebble is 142.82 g
 
        
             
        
        
        
It is believed that the entire solar system was born f<span>rom an early nebula.</span>
        
                    
             
        
        
        
Answer:
The correct answer is D) hydration
 
        
                    
             
        
        
        
Answer:
i think a as well but not sure
Explanation: