What is the approximate total number of atoms present in of ammonia () gas? — Mole Concept and Some Basic Concepts of Chemistry Chemistry Question

💡 Solution & Explanation

Step 1: Calculate moles of $NH_3$. $n = \frac{4.25\text{ g}}{17\text{ g mol}^{-1}} = 0.25\text{ moles}$. Step 2: Find the number of molecules of $NH_3$. Molecules $= 0.25 \times 6.022 \times 10^{23} = 1.505 \times 10^{23}$. Step 3: Account for atomicity. Each $NH_3$ molecule contains 4 atoms (1 N + 3 H). Total atoms $= 4 \times 1.505 \times 10^{23} = 6.022 \times 10^{23}$ atoms.