How many moles of oxygen are needed for the complete combustion of two moles of butane
Correct answer: D. 13
- A. 2
- B. 8
- C. 10
- D. 13
Explanation
The balanced chemical equation for the reaction is as follow 2 C4H10 + 13 O2 => 8 CO2 + 10 H2OFirst of all to construct a balanced chemical equation for any any hydrocarbon: 1.the number of moles of carbon dioxide is equal to the number of carbon in the hydrocarbon.2.the number of moles of water is equal to half the number of hydrogen in the hydrocarbon. 3. Then add oxygen to the reactant side until the number of oxygen is equal on both sides of equation.
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About Fundamental Concepts of Chemistry
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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