answer: 3.40625 moles
Explanation: see the attached pics
 
        
             
        
        
        
Answer:
Reacciones de neutralización 
Mg(OH)2 
NaHCO3
Bicarbonato de sodio 
Cloruro de sodio
Reacciones acido base
HCl + NaOH → NaCl + H2O.
H2SO4 + 2 NaOH → Na2SO4 + H2O.
HCl + NH3 → NH4Cl + H2O.
HCN + NaOH → NaCN + H2O.
Explanation:
 
        
             
        
        
        
If we dissolve salt in water they will reduce the intermolecular forces between water molecule and this will decrease the surface tension.
Surface tension is due to cohesive forces (the forces between molecules of same substance) hence as cohesive forces decreases the surface tension also decreases