Answer: the electric charge
Explanation:
 
        
             
        
        
        
The molecular formula shows the exact number of molecules. Therefor, the empirical formula is the simplest formula of the molecular formula
        
             
        
        
        
If you want an example then a car passing by a standing man is the best one !!
        
                    
             
        
        
        
Answer:
See explanation.
Explanation:
Since potassium tert-butoxide is a strong bulky base, we expect that an elimination reaction predominates.
This reaction is expected to occur by E2 mechanism. The cis isomer of  1-bromo-4-tert-butylcyclohexane is known to react faster by E2 mechanism because it fulfills the anticoplanar arrangement required for for E2 mechanism, where the leaving group and adjacent proton must be anti to each other and in the same plane. The trans isomer can not fulfill this requirement.