One mole of substance at STP has:
Correct answer: D. 22.4 dm³
- A. 2.24 dm³
- B. 24.4 dm³
- C. 2.44 dm³
- D. 22.4 dm³
Explanation
Under Standard Temperature and Pressure (STP), one mole of an ideal gas occupies 22.4 dm3.Under room conditions/ Normal Temperature and Pressure (NTP), one mole of an ideal gas occupies 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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