Answer:
1.68 M
Explanation:
Molar mass (KNO3)= 101.1 g/mol
89g KNO3* 1mol/101.1 g = 89/101.1 mol
(89/101.1 mol)/0.525 L= 1.68 mol/L = 1.68 M
 
        
                    
             
        
        
        
Rutherford’s experimental evidence led to the development of this atomic model from the one before it . According to him , a few of the positive particles pointed at a gold foil appeared to ricochet back off of the light metallic foil. This experimental evidence gives the root the development of the atomic model .
        
             
        
        
        
Al will have a higher first and third ionization energy
        
             
        
        
        
The balanced equation is:
BaCl2 (aq) + Na2SO4 (aq) ----> BaSO4(s)+ 2 NaCl(aq)
This is a double replacement reaction.
The reactants are:
a) BaCl2: barium chloride, a ionic compound, therefore soluble in water, 
b) Na2SO4: sodium sulfate, another ionic compound, therefore also soluble in water.
The products are:
c) BaSO4: barium sulfate, a solid not soluble in water which precipitates.
d) NaCl: sodium chloride, an ionic compound, therefore soluble in water.