Answer:
 144cm²
Explanation:
Given dimensions: 
      Length x breadth x thickness 
         18cm  x   8cm    x    5cm 
The widest part of this figure will be the face containing the length and the breadth. 
The breadth is the width of the figure; 
Area of the widest part  = length x breadth = 18cm x 8cm  = 144cm
The area of the widest part of the figure is  144cm²
 
        
             
        
        
        
We have that the the liquid is
- C_2H_5OH (ethanol
- And at a condition of H_2SO4 as catalyst and temp 170
From the question we are told 
- A student wished to prepare <em>ethylene </em>gas by <em>dehydration </em>of ethanol at 140oC using sulfuric acid as the <em>dehydrating </em>agent.
- A low-boiling liquid was obtained instead of ethylene. 
- What was the liquid, and how might the reaction conditions be changed to give ethylene
<h3>
Ethylene formation</h3>
Generally the equation is
2C_2H_5OH------CH3CH_2O-CH_2CH_3+H_20
Therefore
 with ethanol at 140oC
The product is diethyl ethen
The reaction at 170 ethylene will give 
C_2H_5OH-------CH_2=CH_2+H_2O( at a condition of H_2SO4 as catalyst and temp 170)
Therefore
The the liquid is
For more information on Ethylene visit
brainly.com/question/20117360
 
        
             
        
        
        
I think the correct answer from the choices listed above is option B. Polymerization is the process of forming c<span>omplex molecules by the bond formation between monomers. There are two types of this process which are the addition and condensation polymerization.</span>
        
                    
             
        
        
        
Two sublevels of the same principal energy level differ from each other through shape and size. 
There are mainly 4 energy level s, p, d and f. 
The s level has one orbital and one orbital have two electrons. So the maximum number of electron in s sublevel is 2.
The p level has three orbital and one orbital have two electrons. So the maximum number of electron in s sublevel is 6.
The d level has five orbital and one orbital have two electrons. So the maximum number of electron in s sublevel is 10.
The f level has 7 orbital and one orbital have two electrons. So the maximum number of electron in s sublevel is 14.
They may be differ in magnetic level. 
Thus, we concluded that Two sublevels of the same principal energy level differ from each other through shape and size. 
learn more about energy level:
brainly.com/question/14654539
#SPJ13
 
        
             
        
        
        
Answer:
Cells are the smallest living unit of an organism