Q. How many atoms are present in 0.2 moles of oxygen gas (O₂)?

0.2 मोल ऑक्सीजन गैस (O₂) में कितने परमाणु मौजूद होते हैं?

1.204 × 10²³

2.408 × 10²³

6.022 × 10²²

2.408 × 10²⁴

Given: 0.2 moles of O₂

Steps:

Each O₂ molecule contains 2 atoms
Number of molecules = 0.2 mol × 6.022 × 10²³ molecules/mol = 1.204 × 10²³ molecules
Number of atoms = 1.204 × 10²³ molecules × 2 atoms/molecule = 2.408 × 10²³ atoms

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