In a second-order reaction (one that is second order in one reactant), cutting in half the concentration of that reactant will h
ave what effect on the reaction rate? A) The reaction rate will remain the same.
B) The reaction rate will double.
C) The reaction rate will decrease by a factor of two.
D) The reaction rate will increase by a factor of four.
E) The reaction rate will decrease by a factor of four.
Answer: D) The reaction rate will increase by a factor of four.
Explanation:
Rate law says that rate of a reaction is directly proportional to the concentration of the reactants each raised to a stoichiometric coefficient determined experimentally called as order.
A second order reaction varies with the square of the concentration of the reactant. Therefore, halving the concentration will reduce the rate of reaction by a factor of 4. The answer is E.
I believe that it is A. If you remember in lesson 03.03 it gave multiple examples of things that support the continental drift theory. One of them was fossils of the same organisms found in different continents.
<u>(A) Plants would probably not have enough nitrogen.</u>
Explanation:
<em>According to the passage, bacteria help us digest our food and make yogurt. But it is the bacteria in the soil specifically that "Cycle nitrogen through the ecosystem, which plants rely on"</em>