Sulfur and Oxygen React in a Combination Reaction to Produce

question 158

Multiple Choice

Sulfur and oxygen react in a combination reaction to produce sulfur trioxide,an environmental pollutant: 2S (s) + 3O₂ (g) → 2SO₃ (g)
In a particular experiment,the reaction of 1.0 g S with 1.0 g O₂ produced 0.80 g of SO₃.The % yield in this experiment is ________.

• A)32
• B)80
• C)21
• D)64
• E)47

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