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Question: Answered & Verified by Expert
3 g of H2 react with 29 g of O2 to form H2O . Find the amount of the reactant left unreacted?
ChemistrySome Basic Concepts of ChemistryNEET
Options:
  • A 6 g
  • B 8 g
  • C 5.7 g
  • D 5.2 g
Solution:
1122 Upvotes Verified Answer
The correct answer is: 5.2 g
2H22×2.016=4.032+O232 g→2H2O2×2.016+16=36.032

3 g of H2 require O2=324.032×3=23.8 g

O2 left unreacted =29-23.8=5.2 g

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