mole concept

The molecular mass of H₂SO₄ is:

• 96 amu

• 98 amu

• 100 amu

• 102 amu

The number of particles in one mole of a substance is called:

• Atomic number

• Mass number

• Avogadro's number

• Molarity

The atomic mass of chlorine (Cl) is:

• 32

• 35.5

• 40

• 23

The molecular mass of SO₂ is:

• 48 amu

• 64 amu

• 80 amu

• 32 amu

The formula mass of Ca(OH)₂ is:

• 54 amu

• 74 amu

• 98 amu

• 88 amu

Which of the following is NOT true about Avogadro's number?

• It represents the number of particles in one mole of a substance.

• It is equal to 6.022 × 10²³.

• It is used to convert moles to grams.

• It applies to atoms, molecules, and ions.

One mole of any substance contains:

• 6.022 × 10²² particles

• 6.022 × 10²³ particles

• 3.011 × 10²³ particles

• 1.022 × 10²⁴ particles

The unit of the mole is:

• g/mol

• amu

• L

• None of these

The mass of one mole of oxygen (O₂) gas is:

• 16 g

• 18 g

• 32 g

• 64 g