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

💡 Solution & Explanation

**Solution:** **Step 1: Calculate the 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: Use the molar mass formula** $$\text{Number of moles} = \frac{\text{Given mass}}{\text{Molar mass}}$$ $$n = \frac{13.5}{135} = \frac{135}{1350} = 0.1 \text{ mol}$$ **Answer: 0.1 moles (or $\frac{1}{10}$ mol)** The correct option is **A** because the given mass (13.5 g) is exactly $\frac{1}{10}$ of the molar mass (135 g/mol), yielding 0.1 mol of $SO_2Cl_2$.