Answer:
0.846 moles.
Explanation:
- This is a stichiometric problem.
- The balanced equation of complete combustion of butane is:
C₄H₁₀ + 6.5 O₂ → 4 CO₂ + 5 H₂O
- It is clear from the stichiometry of the balanced equation that complete combustion of 1.0 mole of butane needs 6.5 moles of O₂ to produce 4 moles of CO₂ and 5 moles of H₂O.
<u><em>Using cross multiplication:</em></u>
- 1.0 mole of C₄H₁₀ reacts with → 6.5 moles of O₂
- ??? moles of C₄H₁₀ are needed to react with → 5.5 moles of O₂
- The number of moles of C₄H₁₀ that are needed to react with 5.5 moles of O₂ = (1.0 x 5.5 moles of O₂) / (6.5 moles of O₂) = 0.846 moles.
 
        
             
        
        
        
Below Mechanism shows the mechanism of formation of diazonium ion. Aniline is treated with 
Nitrosonium ion which is generated 
in situ by the reaction of Sodium nitrile and strong acid. The resulting <span>
benzenediazonium ion on reaction with CuBr yields 
Bromobenzene and on treatment with CuCN gives 
Benzonitrile. Mechanism is as folow,</span>
 
        
        
        
See image below for the lewis structure of acrolein
 
        
        
        
We know 1 mole of any atom or molecules contains  atom or molecules.
 atom or molecules.
1 mole of HBr i.e 81 gm/mol contains   atom or molecules.
 atom or molecules.
So, mass of  molecules is :
 molecules is :

Therefore, mass of   molecules is 1.21 gm .
 molecules is 1.21 gm .
Hence, this is the required solution.
 
        
             
        
        
        
I won’t draw it but I can give you 10 Biotic and 5 abiotic
Abiotic: soil, rocks, water, wind, sunlight
Biotic: deer, flower, fish, grass, tree, hawk, human, frog, mouse, worm