What is the number of moles of CO₂ which contain 16 g of oxygen?
Correct answer: B. 0.50
- A. 0.25
- B. 0.50
- C. 1.00
- D. 1.50
Explanation
First, find the moles of oxygen atoms: 16 g / 16 g/mol = 1 mole of O atoms. Since each CO₂ molecule has two oxygen atoms, you need half as many moles of CO₂ to get 1 mole of O atoms, which is 0.5 mol.
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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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