At STP, one mole of any gas may represent:
Correct answer: A. Molar volume of the gas
- A. Molar volume of the gas
- B. Molar mass of the gas
- C. NA molecules of the gas
- D. All of these
Explanation
Option A suggests that one mole of any gas represents the molar volume of the gas. At STP, which is defined as 0°C (273.15 Kelvin) and 1 atmosphere (101.325 kilopascals) pressure, one mole of any gas occupies a volume of approximately 22.4 liters. This relationship is known as the molar volume of a gas at STP. Therefore, option a) is correct.
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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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