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Mole Concept Mastery

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Questions and Answers

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?

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)?

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!