Sulfur Trioxide Can Undergo Decomposition According to the Equation 2SO₃

question 4

Multiple Choice

Sulfur trioxide can undergo decomposition according to the equation 2SO₃ → 2SO₂ + O₂
For this reaction, rate = −0.5Δ[SO₃ ]/Δt = k[SO₃]². If the reaction rate is 1.75 × 10⁻⁷ mol L⁻¹ min⁻¹ when the concentration of sulfur trioxide is 5.4 × 10⁻³ mol L⁻¹, what is the value of the rate constant k?

• A)3.2 × 10 ⁻⁵ L mol ⁻¹ min ⁻¹
• B)1.6 × 10 ⁻⁵ L mol ⁻¹ min ⁻¹
• C)6.0 × 10 ⁻³ L mol ⁻¹ min ⁻¹
• D)3.0 × 10 ⁻³ L mol ⁻¹ min ⁻¹
• E)1.6 × 10 ⁻² L mol ⁻¹ min ⁻¹

Identify and differentiate between demand characteristics and experimenter bias.

Understand various strategies to disguise dependent measures and control variables.

Appreciate the complexity of measuring human performance and the sensitivity of different measures.

Understand the use and importance of deception and non-disclosure to minimize bias in research outcomes.

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