What is the volume occupied by 4.4g of CO₂ at STP?
Correct answer: A. 2.24 dm³
- A. 2.24 dm³
- B. 22.4 dm³
- C. 112 dm³
- D. 1.12 dm³
Explanation
First, find the moles of CO₂: 4.4 g / 44 g/mol = 0.1 mol. At STP, 1 mole of gas occupies 22.4 dm³. Therefore, the volume is 0.1 mol × 22.4 dm³/mol = 2.24 dm³.
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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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