MOLE CONCEPT

What is the value of Avogadro’s number?

• 6.02 × 10²²

• 6.02 × 10²³

• 6.02 × 10²⁴

• 6.02 × 10²⁵

What do we call the amount of substance that contains 6.02 × 10²³ particles?

• Atom

• Mole

• Mass

• Ion

What is the unit for molar mass?

• g

• g/mol  

• mol

• mol/g

How are moles, mass, and number of particles related?

• The more moles, the more particles and mass.

• The more moles, the fewer particles.

• Moles and mass are not related.

• Moles only refer to atoms, not molecules.

If you double the mass of a substance, what happens to the number of moles?

• It doubles.

• It becomes half.

• It stays the same. 

• It becomes zero.

Why do chemists use moles instead of counting individual atoms?

• Atoms are too small and too many to count one by one.

• Moles are easier to spell.

• Counting atoms is faster.

• Moles are only used in biology.

How many moles are in 18 g of water (H₂O)?
(Molar mass = 18 g/mol)

(a)  

Find the number of moles in 44 g of CO₂.
(Molar mass = 44 g/mol)

(a)  

During a group simulation, what is the best way to show cooperation?

• Let one person do everything.

• Ignore your groupmates.

• Work together and share ideas.

• Talk about unrelated topics.

Why is curiosity important in learning about the mole concept?

• It helps you memorize without understanding.

• It makes class time longer.

• It’s not important in science.

• It helps you explore and understand real-life applications.