What is the mass of H₂SO₄ in a 38.2-cm³ sample of concentrated sulfuric acid that has a density of 1.84 g/cm³ and consists of 98.3% H₂SO₄? A)37.6 g B)69.1 g C)4.73 g D)1.81 g E)20.4 g

Question

Quizplus · Accepted Answer

To find the mass of H₂SO₄, we first need to determine the mass of the entire sample of sulfuric acid: density of sulfuric acid = 1.84 g/cm^3 volume of sample = 38.2 cm^3 mass of sample = volume x density = 38.2 x 1.84 = 70.328 g Next, we need to determine how much of the sample is H₂SO₄: percent H₂SO₄ in sample = 98.3% mass of H₂SO₄ = percent x total mass = 0.983 x 70.328 = 69.153 g Therefore, the mass of H₂SO₄ in the sample is 69.1 g. The correct answer is B.

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