What Is the Mole Fraction of Lactose in a Mixture

question 22

Multiple Choice

What is the mole fraction of lactose in a mixture prepared by adding 15.0 g of lactose (C₁₂H₂₂O₁₁) to 100.0 g of water?

• A) c _lactose = 7.83×10 ^{- 3}
• B) c _lactose = 7.89×10 ^{- 3}
• C) c _lactose = 0.130
• D) c _lactose = 0.150
• E) c _lactose = 0.992

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