Answer:
Salt has long been used for flavoring and for preserving food. It has also been used in tanning, dyeing and bleaching, and the production of pottery, soap, and chlorine. Today, it is widely used in the chemical industry.
 
        
             
        
        
        
<span>Xe = VIII = 8 valence electrons
F = VII = 4 (7 ve) = 28 valence electrons</span>
total ve = 8 + 28 = 36 ve
 
<span>36 - 4(2) = 28 ve
(there are 2 electrons in each bond x 4 bonds)</span>
 
<span>28 - 4(6) = 4 
(We assign the remaining electrons to F atoms)</span>
 
<span>4 - 2(2) = 0 
(Therefore 4 electrons left => we have 2 lone pairs)</span>
 
The steric number = No. of
σ bonds + #lone pairs
= 4 σ bonds + 2 lone pairs
= 6 => d²sp³ (6 hybrid orbitals)
 
<span>4 bonds + 2 lone pairs
=> square planar</span>
 
        
             
        
        
        
Answer:
2311.2 cal 
Explanation:
540 cal / g    *   4.28 g = 2311.2  cal 
 
        
             
        
        
        
Answer:
Organelles are structures within a cell that perform specific functions like controlling cell growth and producing energy. Plant and animal cells can contain similar types of organelles. However, certain organelles can only be found in plant cells and certain organelles can only be found in animal cells.
 
        
             
        
        
        
1 is c 2 is b 3 is 1 d 4 is a