Answer:
Earth's atmosphere is divided into five main layers: the exosphere, the thermosphere, the mesosphere, the stratosphere and the troposphere.
Explanation:
 
        
             
        
        
        
Answer:
Do your project by yourself
 
        
             
        
        
        
Answer: 714 g Al2O3
Explanation: Solution attached
First convert mass of O2 to moles
Do the mole ratio between O2 and Al2O3 from the balanced equation.
Convert moles of Al2O3 to mass using its molar mass.
 
        
             
        
        
        
0.600
D) 0.600 is the final concentration of the solution of KCl.
V1 = 50.0 mL.