10 moles of hydrogen are allowed to react with 6 moles of oxygen. How much water will be obtained from this reaction on complete consumption of one gas?
Correct answer: A. 10 moles
- A. 10 moles
- B. 6 moles
- C. 8 moles
- D. 4 moles
Explanation
The balanced equation for the reaction of hydrogen and oxygen is: 2H2 + O2 → 2H2O.This equation tells us that 2 moles of hydrogen react with 1 mole of oxygen to produce 2 moles of water. So, if we have 10 moles of hydrogen, we will need 5 moles of oxygen to react completely. Since oxygen and water are in a 1:2 ratio, and we have 5 moles of oxygen hence 5 X 2=10 moles of water will be produced.
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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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