Question

1. You are driving to a snowboarding trip in the mountains. It is significantly colder there and you must be careful not to get dizzy because the air pressure is lower and there is less oxygen. After snowboarding all day you go back to your car only to discover that it will not turn on. The battery seems to be dead. What has likely happened?
A. The cold temperature has slowed the reaction that produces electricity and it cannot generate enough current to start the car.
B. The low pressure has slowed the reaction that produces electricity and it cannot generate enough current to start the car.
C. There is not a high enough concentration of oxygen for the electricity generating reaction in the battery to occur.
D. The pressure is not high enough for the electrical current to flow in the right direction and the battery has stalled.

2.You are experimenting on the effect of temperature on the rate of reaction between hydrochloric acid (HCl) and potassium iodide (KI). When the reaction is completed at 273K there are approximately 250,000 collisions per mole of reactant. You run the experiment again at 350K. Which of the following would you expect to be the number of collisions recorded at 350K
A. 2000
B. 0
C. 200,000
D. 700,000

Answer 1

D. the pressure is not high enough for the electrical current to flow in the right direction and the battery has stalled