How many moles of H₂O are formed from 4 moles of H₂?
Correct answer: B. 4
- A. 2
- B. 4
- C. 8
- D. 6
Explanation
According to the balanced chemical equation: 2H₂ + O₂ → 2H₂O. This indicates that 2 moles of hydrogen gas react completely with 1 mole of oxygen gas to produce 2 moles of water.Therefore, if 4 moles of hydrogen gas are available (and oxygen is in excess), they will produce 4 moles of water.
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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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