The number of moles of CO2 which contains 16g of oxygen:
Correct answer: C. 0.50
- A. 0.25
- B. 1.00
- C. 0.50
- D. 1.50
Explanation
There are 0.5 moles of CO2 which contains 16g of oxygen. This is because one mole of CO2 has a mass of 44g, and oxygen accounts for 32g of that mass. Therefore, 16g of oxygen is present in 16g/32g/mol = 0.5 moles of CO2.
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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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