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Which of the following has the same number of moles as in 398 grams of CuSO4?(a) 2 grams of hydrogen(b) 40 grams of oxygen(c) 35 grams of nitrogen(d) 58.5 grams of Sodium chlorideI had been asked this question by my college professor while I was bunking the class.Asked question is from The Mole topic in chapter Moles, Density & Concentration of Basic Chemical Engineering

Answer»

The correct option is (b) 40 grams of OXYGEN

The explanation is: NUMBER of moles of CuSO4 = 398/ 159 ≈ 2.5, and number of moles of oxygen = 40/16 = 2.5.



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