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9.8 g of H₂SO₄ has been dissolved in excess water to ionize it completely. How many number of H ions it will yield?
  1. 1.802 × 10²⁴
  2. 1.204 × 10²³
  3. 1.204 × 10²⁴
  4. None of these
Explanation
  • Moles of H₂SO₄ = mass / molar mass = 9.8 g / 98 g/mol = 0.1 mol.
  • Each H₂SO₄ molecule releases 2 H⁺ ions.
  • So total H⁺ ions = 0.1 mol × 2 × 6.022 × 10²³ = 1.204 × 10²⁴ ions.

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