The right answer is B.Chris is right because some of the mass of the reactants escaped as gas. 
Sorry I'm late, but I hope I helped
 
        
             
        
        
        
The child could be night blind or have normal vision.<span>
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The hormone Progesterone increases in the blood to a level that causes lh to be released from the anterior pituitary.]
        
             
        
        
        
Answer:
A.) An air mass cannot transfer energy from one area to another
Explanation:
The air masses are constantly on the move. They can be warm and moist, or cold and dry, as well as hot and dry, all depending on the place above which they have formed. The air masses that form over warm, large bodies of water and warm and moist. The air masses that form over cold regions are cold and dry, and the air masses that form deeper into the continent in hot regions, are hot and dry. Because the air masses are constantly on the move, they manage to transfer their energy from one area to another, resulting in change of weather conditions as the energy is transferred.
 
        
             
        
        
        
The smallest unit of matter that has the characteristic properties of it’s element is called an “atom”.
Individual atoms are called “elements” for that reason.
There are smaller divisions of matter, however those no longer have the characteristics of the element that they may be a part of. A hydrogen electron is indistinguishable from an argon electron, or any other.