1. NaCl
2. CaO
3. KOH
4. MgS
5. CuCO3
6. Al2O3
7. Fe2O3
8. Na2CO3
9. AlHO3
10. (NH4)3N
11. Zn3N2
12. MgCO3
All numbers are subscripts.
        
             
        
        
        
Answer:
Heterogeneous mixture
Explanation:
Soil is composed of small pieces of a variety of materials, so it is a heterogeneous mixture. 
 
        
             
        
        
        
The amount of water that must be added to 6.0 M silver nitrate to make 500mL of 1.2 M solution is : 2000 mL 
<u>Given data :</u>
Concentration of siilver nitrate ( M₁ ) = 6.0 M 
volume of solution ( V₁ ) = 500 mL 
Conc of solution ( M₂ )= 1.2 M
<h3>Determine the amount of water that must be added</h3>
we will apply the equation below 
M₁V₁ = M₂V₂ ---- ( 1 )
where : V₂ = V₁ + water added   ---- ( 2 ) 
V₂ ( Final volume ) = ( M₁V₁ ) / M₂
                               = ( 6 * 500 ) / 1.2 
                               = 2500 mL 
Back to eqaution ( 2 ) 
2500 mL = 500 mL + added water 
therefore ; added water = 2500 - 500 
                                         = 2000 mL 
Hence we can conclude that The amount of water that must be added to 6.0 M silver nitrate to make 500mL of 1.2 M solution is : 2000 mL. 
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<h3><u>Answer;</u></h3>
Dipole-dipole and hydrogen bonding
<h3><u>Explanation;</u></h3>
- <em><u>A solution of water and ethanol contains the dipole-dipole forces and hydrogen bonds as the intermolecular forces between molecules.</u></em>
- <em><u>Hydrogen bonding is a type of interactions between molecules that occurs when a partially negative atom such as oxygen end of one of the molecules is attracted to a partially positive hydrogen end of another molecule.</u></em>
- <em><u>Dipole-dipole forces</u></em> results from the unsymmetrical distribution of electrons, thus the polarity does not balance, thus resulting to a dipole attraction between molecules.
 
        
        
        
Explanation:
By losing or gaining electrons from its outermost orbit