Q.

Determine the number of moles of 213 g of Chlorine (Cl2) gas.

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a

2

b

3

c

4

d

5

answer is D.

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Detailed Solution

Given:  Mass of the given substance (m)= 213 g 
             Molar mass of Chlorine (Cl2) (M)= 35.5 X 2 = 71g 
Solution:
Number of moles of (Cl2) gas = Mass of chlorine (m)Molar mass of chlorine(M)  


                                                          = 213g71g        

  
                                                          = 3 moles 
The number of moles of chlorine (Cl2) gas in 213g of sample is 3.
 

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