The number of moles in an element is directly proportional to:
Correct answer: A. Mass of an element
- A. Mass of an element
- B. Empirical formula mass
- C. Molar mass of an element
- D. Formula mass
Explanation
Since molar mass is constant for a given element, increasing the mass increases the number of moles proportionally. For example, doubling the mass of an element doubles the number of moles, making them directly proportional.
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About Moles and Avogadro's Number
The mole connects the microscopic number of particles with measurable mass, using Avogadro's number, 6.022 × 10²³ particles per mole. Questions involve molar mass, conversion between mass, moles and particles, percentage composition, empirical and molecular formulas, and distinguishing atoms, molecules, ions and formula units.
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