<span>Avogadro's number
represents the number of units in one mole of any substance. This has the value
of 6.022 x 10^23 units / mole. This number can be used to convert the number of
atoms or molecules into number of moles. We calculate as follows:
0.340 mol Br2 ( </span>6.022 x 10^23 molecules / mol ) = 2.05 x 10^23 molecules
        
                    
             
        
        
        
Answer:
1.95
Explanation:
Just did the test and it was correct!
 
        
                    
             
        
        
        
Answer : The work done by the system is, 2.2722 J
Explanation :
The expression used for work done in reversible isothermal expansion will be,

where,
w = work done = ?
n = number of moles of gas  = 0.00100 mole
R = gas constant = 8.314 J/mole K
T = temperature of gas  = 
 = initial volume of gas  = 25 mL
 = initial volume of gas  = 25 mL
 = final volume of gas  = 75 mL
 = final volume of gas  = 75 mL
Now put all the given values in the above formula, we get:


Therefore, the work done by the system is, 2.2722 J
 
        
             
        
        
        
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