The number of molecules in a drop of water (volume ) is: — Mole Concept and Some Basic Concepts of Chemistry Chemistry Question

💡 Solution & Explanation

$\text{Mass} = 0.05 \text{ g}$. $\text{Moles} = 0.05 / 18 \approx 0.00277 \text{ mol}$. <br>$\text{Molecules} = 0.00277 \times 6.022 \times 10^{23} \approx 1.67 \times 10^{21}$.