When the volume is 450 cm3 so the boat will displace 450 g.
so we have  450 g - 14.5g = 435.5 left 
so to get how many pennies can be added to the boat before it sinks can be determined by:
divided the mass for the one penny:
no.of Penny = 435.5 / 2.5g
                     = 174.2 
∴ the boat will float with 174 pennies and will start to sink with 175 
        
             
        
        
        
Answer:
K = 2.96x10⁻¹⁰
Explanation:
Based on the initial reaction:
N2O4 ⇄ 2NO2; K = 1.5x10³
Using Hess's law, we can multiply this reaction changing K:
3 times this reaction:
3N2O4 ⇄ 6NO2; K = (1.5x10³)³ =3.375x10⁹
The inverse reaction has a K of:
6NO2 ⇄ 3N2O4 K = 1/3.375x10⁹;
<h3>K = 2.96x10⁻¹⁰</h3>
 
        
             
        
        
        
2Ca(OH)2(aq) + 2FeCl3(aq) on the dead locs
 
        
                    
             
        
        
        
B will be the one I think tbh
        
             
        
        
        
Answer:
2 ATP molecules are produced