Which of the following samples contains the maximum total number of atoms?

Step-by-step solution

Number of moles = Given mass Molar mass Total number of atoms = Number of moles Atomicity N _ A (1) For 18 g of H ₂ O : Moles = 18 18 = 1 Total atoms = 1 3 N _ A = 3 ~N _ A (2) For 16 g of CH ₄ : Moles = 16 16 = 1 Total atoms = 1 5 N _ A = 5 ~N _ A (3) For 14 g of N ₂ : Moles = 14 28 = 0.5 Total atoms = 0.5 2 N _ A = 1 ~N _ A (4) For 11 g of CO ₂ : Moles = 11 44 = 0.25 Total atoms = 0.25 3 N _ A = 0.75 ~N _ A Thus, 16 g of CH ₄ contains the maximum number of atoms. Answer: 16 g of CH ₄