An aqueous solution of NaCl has a mole fraction of 0.21 What is the mass of NaCl dissolved in 100.0mL of solution?
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moles NaCl = 0.21
mass NaCl = 0.21 x 58.44 g/mol=12.3 g
moles H2O = 1 - 0.21 = 0.79
mass water = 0.79 x 18.02 g/mol=14.2 g
12.3 : 14.2 = x : 100
x = 86.4 g
mass NaCl = 0.21 x 58.44 g/mol=12.3 g
moles H2O = 1 - 0.21 = 0.79
mass water = 0.79 x 18.02 g/mol=14.2 g
12.3 : 14.2 = x : 100
x = 86.4 g
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