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KEAM Rate Ratios — practice questions

Explore 1 free Rate Ratios questions in KEAM Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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Rate Ratios questions and exercises with answers

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For the same reaction ($2N_2O_5 \to 4NO_2 + O_2$, $d[N_2O_5]/dt = -0.02$), the **rate of formation of $NO_2$** is:Read the answer and worked solution →

Worked practice questions

For the same reaction ($2N_2O_5 \to 4NO_2 + O_2$, $d[N_2O_5]/dt = -0.02$), the **rate of formation of $NO_2$** is:

  1. 0.08 mol dm⁻³ s⁻¹
  2. 0.02 mol dm⁻³ s⁻¹
  3. 0.04 mol dm⁻³ s⁻¹
  4. 0.01 mol dm⁻³ s⁻¹
Show answer and solution

Correct answer: C. 0.04 mol dm⁻³ s⁻¹

$-\frac{1}{2}d[N_2O_5]/dt = \frac{1}{4}d[NO_2]/dt$ ⇒ $d[NO_2]/dt = 2\,|d[N_2O_5]/dt| = 2(0.02) = 0.04$ mol dm⁻³ s⁻¹.

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