Increasing the temperature usually causes the rate of a reaction to increase. Which of the following is not usually a cause of this effect?
When a molecule of collides with a molecule of , a molecule of may be formed. Which of the following is not a requirement for this reaction to take place?
Magnesium reacts with aqueous hydrochloric acid to form aqueous magnesium chloride. Which of the following quantities could be reduced to increase the rate of this reaction?