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FPGEE Pharmacy Exam Prep

Category - FPGEE

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80.0 grams of NaOH is dissolved in 3.0 moles of H20. What is the mole fraction of NaOH in this solution?

Explanation

Answer: .40

The mole fraction for a compound indicates (moles of given compund) / (total moles of system). In this question, there are two moles of NaOH and five total moles in the system. Thus, the mole fraction is expressed as 2/5, or .40.

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