The mole fraction of water in a solution containing 117 gram sodium chloride and 900 g of water is

1. Number of moles of NaCl :
        Given weight =117g
       Molecular weigth = 58.44g/mol
 Number of moles = 117g54.44g/mol=2.14 moles

2. Number of moles of water :
    Given weight = 900g
 Molecular weight = 18g/mol
​  Mo. of moles = 900g18g/mol=50 moles

3. Mole Fraction of water : 
nwaternwater+ nNaCl=5050 +2.14=505.14=0.95
 

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