Question

Mass removed from the sample 8 gm O atom

Answer 1

Molar Mass Oxygen atom = 16 u.

Thus, 1 mole Oxygen = 16 g. → 8 g = 0.5 mol.

NA = 6.022 *10^23 mol^-1

Therefore: Number of atoms = 6.022*10^23 * 0.5 = 3.011 * 10^23 oxygen atoms.

Final answer, corrected for accuracy: 3 * 10^23 oxygen atoms.

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