Moderate

The number of reacting molecules whose concentration change during reaction is called:

Correct answer: B. Order of reaction

  • A. Rate of reaction
  • B. Order of reaction
  • C. Activated molecule
  • D. Half-life

Explanation

The number of reacting molecules whose concentration changes during a reaction is called the order of reaction. It is a measure of how the rate of reaction depends on the concentration of the reactants.

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About Reaction Kinetics

Reaction kinetics relates reaction rate to concentration, temperature, surface area and catalysts. Questions cover rate laws, reaction order, rate constants, activation energy and the activated complex, including how a catalyst lowers the activation energy without changing the overall energy change or equilibrium position.

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