11.2L of CO₂ at STP corresponds to how many moles?
Correct answer: A. 0.5
- A. 0.5
- B. 0.3
- C. 0.2
- D. 0.1
Explanation
At STP, one mole of any ideal gas occupies 22.4 L. Therefore, the number of moles is the given volume divided by the molar volume: 11.2 L / 22.4 L/mol = 0.5 moles.
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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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