Which of the following contains the same number of atoms as 12g of Mg? — Mole Concept and Some Basic Concepts of Chemistry Chemistry Question

💡 Solution & Explanation

$\text{Moles Mg} = 12/24 = 0.5$. $\text{Moles Ca} = 24/40 = 0.6$ (Incorrect). Check Option B again: 20g of Ca would be 0.5. Let's check 14g N: $14/14 = 1$ (Incorrect). Let's check 8g O: $8/16 = 0.5$. Thus, 8g of Oxygen atoms (not $O_2$ molecule) has 0.5 moles of atoms. Correct Answer: D. [3]