Answer:
B. tension
Explanation:
 a straight stretched rubber band experiences tension which is a stress that tries to pull matter apart.
 
        
             
        
        
        
The yield of lithium chloride is 1.92 grams. 
Option D. 
<h3><u>Explanation:</u></h3>
In this reaction, we can see that 1 mole of lithium hydroxide reacts with 1 mole of potassium chloride to produce 1 mole of lithium chloride and 1 mole of potassium hydroxide. 
Molecular weight of lithium hydroxide is 24.
Molecular weight of lithium chloride is 42.5.
So 24 grams of lithium hydroxide produces 42.5 grams of lithium chloride. 
So, 20 grams of lithium hydroxide produces 
  grams =11. 29 grams of lithium chloride. 
But this is when the yield is 100%.
But yield is 17%.
So the yield is 1.92 grams of lithium chloride. 
 
        
             
        
        
        
Explanation:
its hard to explain unless we know what the question fully asks..
 
        
             
        
        
        
Answer:
Explanation:
2C₂H₅OH    =   C₄H₆  +  2H₂O  +  H₂
2 mole               1 mole 
molecular weight of ethyl alcohol 
mol weight of C₂H₅OH = 46 gm             
mol weight of C₄H₆  54 gm 
540 gm of C₄H₆ = 10 mole 
10 mole of C₄H₆ will require 20 mol of ethyl alcohol .
20 mole of ethyl alcohol = 20  x 46 
= 920 gm 
ethyl alcohol required = 920 gm . 
 
        
             
        
        
        
Mg gained mass because it went from being a single element (on the reactant side) to being a molecule (on the product side).