One mole of oxygen gas contains:

A. 6.022 × 10²³ atoms A.

B. 3.011 × 10²³ molecules B.

C. 6.022 × 10²³ molecules C.

D. 1 molecule D.

Correct Answer: C সঠিক উত্তর: C

Explanation ব্যাখ্যা

Oxygen gas (O₂) is diatomic, meaning one molecule of oxygen gas consists of two oxygen atoms.
One mole of any substance contains 6.022 × 10²³ entities (atoms, molecules, ions, etc.).
So, 1 mole of O₂ contains: 6.022 × 10²³ molecules of O₂
2 × 6.022 × 10²³ = 1.2044 × 10²⁴ atoms of Oxygen.

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Correct Answer: C সঠিক উত্তর: C

Explanation ব্যাখ্যা

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