How many atoms of sulfur are in 280 g of a 50% by mass H₂SO₄ solution? A) 8.6 × 10²⁵ atoms B) 8.6 × 10²³ atoms C) 8.0 × 10²⁵atoms D) 8.0 × 10²³ atoms E) 2.8 × 10²⁹ atoms

Question

Quizplus · Accepted Answer

The solution contains 140 g of H₂SO₄ (50% of 280 g). The molar mass of H₂SO₄ is 98 g/mol, so there are 140 g / 98 g/mol = 1.4286 mol of H₂SO₄. Each molecule of H₂SO₄ contains one sulfur atom, so there are 1.4286 mol × 6.022 × 10²³ atoms/mol = 8.6 × 10²³ sulfur atoms.

How Many Atoms of Sulfur Are in 280 G of a 50