One mole is the amount of substance that contains as many elementary entities as contained in:
Correct answer: C. 0.012 kg of 6C12 atom
- A. 0.12 kg of 6C12
- B. 1.2 kg of 6C12 atom
- C. 0.012 kg of 6C12 atom
- D. 0.12 kg of 8O16
Explanation
One mole is defined as the amount of substance containing as many elementary entities (atoms, molecules, etc.) as there are atoms in 12 grams of the carbon-12 isotope. This is also known as Avogadro's number, approximately 6.022 x 1023 entities. The correct option, 0.012 kg of 6C12, is a simple conversion of 12 grams to kilograms, aligning with the standard definition of a mole. The other options either use incorrect masses or a different isotope, which do not fit the definition based on carbon-12.
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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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