Given solution contains 16.0 g of CH3OH, 92.0 g of C2H5OH and 36 g of water. Which statement about mole fraction of the components is true?
Correct answer: B. Mole fraction of C2H5OH and H2O is the same
- A. Mole fraction of CH3OH is highest among all components
- B. Mole fraction of C2H5OH and H2O is the same
- C. Mole fraction of CH3OH and C2H5OH is same
- D. Mole fraction of H2O is the lowest among all
Explanation
No. of moles of CH3OH = 16/32 = 0.5No. of moles of C2H5OH= 92/46 =2No. of moles of H2O = 36/18 =2Formula to calculate mole fraction,no. of moles of the component/ Total no. of moles of all the components∴ no. of moles of CH3OH = 0.5/4.5 =1/9no. of moles of C2H5OH= 2/4.5no. of moles of H2O = 2/4.5
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Mole calculations connect mass, number of particles and Avogadro's number, while balanced equations provide the mole ratios used in stoichiometry. Questions cover limiting and excess reactants, theoretical yield and percentage yield, including identifying which reactant is consumed first and comparing the actual product with the maximum possible product.
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