The correct option is A. Rutherford model of the atom consider an atom to be made up of a central nucleus with electrons orbiting around it. The nucleus is considered to be tiny, heavy and its positively charged while the electrons are negatively charged. The shortcoming of this model is that it was not able to explain how the positive nucleus was not able to attract the negative electrons and pull them inside the nucleus. 
        
             
        
        
        
Answer: Mixing vinegar and baking soda initiates a chemical reaction that produces carbon dioxide and water.
Explanation:
 
        
             
        
        
        
<span>A- solute is the answer you were looking for
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On a molecular level there is a lot of movement which in turn is the reason why heat is generated.
        
                    
             
        
        
        
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Hey There!</h2><h2>
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Answer:</h2><h2>
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TRIPLE POINT:</h2>
Triple point is that temperature, at which the substance is found in all three states i.e. solid, liquid and gas. Every substance has different triple point, because Triple point is just above the freezing point and each substance has different freezing and boiling point.
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_____________________________________</h2><h2>WATER:</h2>
Water has a Melting point or Freezing Point (MP or FP) of  C or 273K and Boiling point (BP)
 C or 273K and Boiling point (BP)  C or 373 K. Since the triple point is just above the MP or FP thus Triple Point of water is
 C or 373 K. Since the triple point is just above the MP or FP thus Triple Point of water is  C or 273.16K.
C or 273.16K. 
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_____________________________________</h2><h2>Best Regards,</h2><h2>'Borz'</h2><h2 />