The number of moles of in 13.5 g is : — Mole Concept and Some Basic Concepts of Chemistry Chemistry Question

💡 Solution & Explanation

# Solution: Moles of $SO_2Cl_2$ **Step 1: Calculate molar mass of $SO_2Cl_2$** $$M = S + 2(O) + 2(Cl)$$ $$M = 32 + 2(16) + 2(35.5)$$ $$M = 32 + 32 + 71 = 135 \text{ g/mol}$$ **Step 2: Apply moles formula** $$\text{moles} = \frac{\text{mass}}{\text{molar mass}}$$ $$n = \frac{13.5}{135} = 0.1 \text{ mol}$$ **Answer: 0.1 mol (or $10^{-1}$ mol)** The correct option A is right because we correctly identified all atomic masses and divided the given mass by the molar mass to get moles.