# chemistry

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If exactly 100.0 grams of NaCl (molecular mass = 58.44 g/mol) are dissolved in 300 grams of water (molecular mass = 18.02 g/mol), the mole fraction of NaCl is

a) 1.71
b) 0.0932
c) 0.250
d) 0.103
e) 4.75

• chemistry -

moles NaCl = grams/molar mass.
moles H2O = grams/molar mass
total moles = nH2O + nNaCl

XNaCl = n NaCl/total moles.

• chemistry -

b?

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