The number of neutrons in 0.45 g of water is: (assuming all atoms are and atoms are ) — Mole Concept and Some Basic Concepts of Chemistry Chemistry Question

💡 Solution & Explanation

$\text{Moles of } H_2O = 0.45 / 18 = 0.025$ mol. <br>Neutrons per molecule: $H(0) + O(16-8=8) = 8$ neutrons. <br>$\text{Total neutrons} = 0.025 \times 8 \times N_A = 0.2 N_A$.