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Stoichiometry Mole Concept and Number of Atoms

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The number of oxygen atoms present in 49 g H₂SO₄ is:

Verified Answer & Explanation⌄

Correct Answer: C) 2NA

Concept Explanation

Molar mass of H₂SO₄ = 98 g mol⁻¹. 49 g = 0.50 mol H₂SO₄. Each molecule contains 4 O atoms. O atoms = 0.50 × 4 = 2 mol O atoms = 2NA atoms.

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