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How many molecules of \(\mathrm{H_2O}\) are contained in 2.48 g of \(\mathrm{Na_2S_2O_3H_2O}\) (at.wt. of Na=23,S=32)

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Mole conceptLaw of chemical combination, atomic & molecular mass, mole concept, calculationsMEDIUMJEE Chemistry
How many molecules of \(\mathrm{H_2O}\) are contained in 2.48 g of \(\mathrm{Na_2S_2O_3H_2O}\) (at.wt. of Na=23,S=32) **Options:** - **A.** [object Object] - **B.** [object Object] - **C.** [object Object] - **D.** [object Object] --- **Difficulty:** MEDIUM | **Chapter:** Mole concept | **Topic:** Law of chemical combination, atomic & molecular mass, mole concept, calculations

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## ✅ Correct Answer: **C** ### 📖 Detailed Explanation: This question uses mole concept & particle counting. Convert all given quantities into moles using n = given amount/molar mass, use Avogadro's number where needed to get particles, and then compare with the options; this matches option C. --- *This is an official solution provided by Chem Mantra. For more chemistry questions and solutions, explore our [question bank](/courses).*

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Mole conceptLaw of chemical combination, atomic & molecular mass, mole concept, calculationsMEDIUMJEE Chemistry