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Questions and Answers
Which of the following statements about the mole concept is true?
Which of the following statements about the mole concept is true?
- The mole concept is a way to count atoms and molecules
- The mole concept is based on Avogadro's number (correct)
- The mole concept is only applicable to gases
- The mole concept is used to measure temperature
What is the relationship between the mass of a substance and the number of moles?
What is the relationship between the mass of a substance and the number of moles?
- The mass of a substance is directly proportional to the number of moles (correct)
- The mass of a substance is inversely proportional to the number of moles
- The mass of a substance is unrelated to the number of moles
- The mass of a substance is equal to the number of moles
What is the molar mass of water (H2O)?
What is the molar mass of water (H2O)?
- 18 g/mol (correct)
- 22 g/mol
- 20 g/mol
- 24 g/mol
Study Notes
Mole Concept
- The mole (mol) is a unit that relates the mass of a substance to the number of particles it contains.
- The relationship between the mass of a substance and the number of moles is that one mole of a substance has a mass equal to its molar mass expressed in grams.
Molar Mass of Water
- The molar mass of water (H2O) is 18.0153 g/mol, which is the sum of the atomic masses of two hydrogen atoms (1.00794 g/mol each) and one oxygen atom (15.9994 g/mol).
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Description
Test your knowledge of the mole concept with this quiz! Explore the relationship between mass and number of moles and discover the molar mass of water. Challenge yourself and ace the mole concept!
