The Avogadro number of 24g of magnesium is the same as that of

 4. The Avogadro number of 24g of magnesium is the same as that of 

A. 1g of hydrogen molecules

B. 16g of oxygen molecules

C. 32g of oxygen molecules

D. 35g of chlorine molecules

The Correct answer is C

Workings

24 g of magnesium = 1 mole of Mg atoms, so it contains Avogadro’s number of particles.

Now check the options:

• A. 1 g of hydrogen molecules (H₂)
  Molar mass = 2 g/mol → 1 g = 0.5 mol ❌

• B. 16 g of oxygen molecules (O₂)
  Molar mass = 32 g/mol → 16 g = 0.5 mol ❌

• C. 32 g of oxygen molecules (O₂)
  Molar mass = 32 g/mol → 32 g = 1 mole ✅

• D. 35 g of chlorine molecules (Cl₂)
  Molar mass = 71 g/mol → 35 g ≈ 0.5 mol ❌

✅ Correct Answer: C. 32 g of oxygen molecules

Further illustration

A. MOLES=MASS/MOLAR MASS 1/2=0.5 MOLE❌

B. MOLES=MASS/MOLAR MASS 16/32=0.5 MOLE❌

C.MOLES=MASS/MOLAR MASS 32/32=1 MOLE✅

D. MOLES=MASS/MOLAR MASS 35/71=0.5 MOLE❌

QUESTION FOUR