Answer: The theoretical yield of aspirin is 4.14 g
Explanation:
To calculate the moles :
 
   
mass of acetic anhydride =  
 
 
 
  
According to stoichiometry :
1 mole of salycylic acid require 1 mole of acetic anhydride
Thus 0.023 moles of  salycylic acid require= of acetic anhydride
  of acetic anhydride
Thus salycylic acid is the limiting reagent as it limits the formation of product and acetic anhydride is the excess reagent.
As 1 mole of salycylic give = 1 mole of aspirin
Thus 0.023 moles of salycylic acid give = of aspirin
  of aspirin
Mass of aspirin =  
Thus theoretical yield of aspirin is 4.14 g
 
        
             
        
        
        
Answer:
A. CsBr(s)
Explanation:
we will get here compound with the lowest lattice energy
solution
As we know that Lattice energy is always proportional to the charge of ions and it is inversely proportional to the size of ions.
so that by the smallest charge and the largest size give us the lowest lattice energy and that charge and size is express as here as 
Charge 
Cs (+1), K(+1), Na (+1), Cl(-1), Br(-1), Sr(+2), Ca(+2), O(-2)     .......................1
and 
Size 
Na+ < Ca2+ < K+ < Sr2+ < Cs+, O2- < Cl- < Br-                ..........................2
so that here 
correct answer is A. CsBr
 
        
             
        
        
        
Answer:
B the atmosphere it's not on earth and I'm pretty sure  the atmosphere doesn't have water in 
Explanation: