What is the mass of H₂SO₄ in a 46.4-mL sample of concentrated sulfuric acid that has a density of 1.84 g/mL and consists of 98.3% H₂SO₄? A) 45.6 g B) 83.9 g C) 3.90 g D) 1.81 g E) 24.8 g

Question

Quizplus · Accepted Answer

First, we need to calculate the mass of the concentrated sulfuric acid in the sample: mass = density x volume mass = 1.84 g/mL x 46.4 mL mass = 85.184 g Next, we need to calculate the mass of H₂SO₄ in the sample, which is equal to 98.3% of the total mass (the remaining 1.7% is water): mass of H₂SO₄ = 0.983 x 85.184 g mass of H₂SO₄ = 83.679 g Therefore, the mass of H₂SO₄ in a 46.4-mL sample of concentrated sulfuric acid is 83.9 g (rounded to the nearest tenth). The correct answer is B.

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