If we consider 1/6th in place of 1/12th mass of carbon atom as the relative atomic mass unit, the mass of one mole of a substance will:
Correct answer: B. Increase two-fold.
- A. Decrease to half.
- B. Increase two-fold.
- C. Decrease quarter-fold.
- D. Become fractional.
Explanation
The relative atomic mass unit is based on the mass of carbon-12. If we change the basis to 1/6th of the carbon atom's mass instead of 1/12th, the unit becomes larger. Consequently, the number of these larger units in a mole decreases, effectively doubling the mass of one mole of a substance. Therefore, the mass of a mole would increase two-fold. Options A and C incorrectly suggest decreases, while Option D incorrectly suggests a fractional result, which is not applicable in this context.
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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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