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Questions and Answers
Which of the following is the correct definition of the mole?
Which of the following is the correct definition of the mole?
- The quantity of elementary entities in one mole is the Avogadro number
- The mole is defined as exactly 6.02214076×1023 elementary entities
- The unit of amount of substance in the International System of Units (SI) (correct)
- The number of elementary entities in one mole is the approximate number of nucleons in one gram of ordinary matter
Which of the following is an example of an elementary entity?
Which of the following is an example of an elementary entity?
- An ion pair
- A chemical compound like water
- A subatomic particle such as a proton (correct)
- A chemical element like mercury
Which statement about the mole is correct?
Which statement about the mole is correct?
- 10 moles of water and 10 moles of mercury contain equal amounts of substance
- The Avogadro number is the number of elementary entities in one mole
- The mole was defined as the number of elementary entities before the 2019 redefinition of SI base units (correct)
- The mole is the approximate number of nucleons in one gram of ordinary matter
