Question

1. what is the name for a biological catalyst? a. enzyme b. radical c. biolyst 68. which of the following is not something that would affect the rate of a chemical reaction? a. the use of a catalyst. b. lowering the temperature. c. breaking up the sample into smaller pieces. d. not watching the reaction as it happens. 69. “if a change is made to a system in chemical equilibrium, the equilibrium shifts to oppose the change until a new equilibrium is reached.” this is a statement of... a. newton’s second law b. le chatelier’s principle c. pascal’s principle 70. for the following reaction in chemical equilibrium: 4hcl(g) + o2(g) ⇌ 2cl2(g) + 2h2o(g) + heat in order to maximize the production of hydrogen chloride gas, you could... a. cool the reaction. b. raise the pressure. c. lower the pressure. in order to maximize the production of chlorine gas, you could... a. cool the reaction. b. lower the pressure. c. remove some of the oxygen.

Explanation:

• For question 67, enzymes are biological catalysts that speed - up biochemical reactions.
• For question 68, watching the reaction does not affect its rate; factors like catalysts, temperature, and surface area do.
• For question 69, Le Chatelier's principle describes how a chemical equilibrium responds to changes.
• For question 70 (production of HCl), lowering pressure shifts the equilibrium to the side with more moles of gas (left - side for HCl production). For chlorine production, since the reaction is exothermic, cooling the reaction shifts the equilibrium to the right (product - side).

Answer:

1. a. enzyme
2. d. Not watching the reaction as it happens
3. b. Le Chatelier’s principle
4. (production of HCl) c. lower the pressure
5. (production of chlorine gas) a. cool the reaction