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What is the mass fraction of 4 moles of Sodium in 8 moles of Hydrogen chloride?(a) 0.24(b) 0.48(c) 0.56(d) 0.72The question was posed to me during an online exam.I'm obligated to ask this question of Mole Fraction and Mass(Weight) Fraction topic in chapter Moles, Density & Concentration of Basic Chemical Engineering |
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Answer» CORRECT answer is (a) 0.24 For explanation I would SAY: Mass of sodium = 4*23 = 92 g, mass of hydrogen chloride = 8*36.5 = 292 g, => mass fraction of sodium = 92/(92 + 292) = 0.24. |
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