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Author Question: Which of the following statements about how ECPs and RU-486 work is most correct? A) Both ECPs ... (Read 87 times)

viki

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on: Aug 27, 2018
Which of the following statements about how ECPs and RU-486 work is most correct?
 
  A) Both ECPs and RU-486 prevent pregnancy.
  B) ECPs prevent pregnancy, while RU-486 ends pregnancy at an early stage.
  C) ECPs end pregnancy at an early stage, while RU-486 prevents pregnancy.
  D) Both ECPs and RU-486 end pregnancy at an early stage.

Question 2

The rate constant for a particular second-order reaction is 0.47 M-1s-1. If the initial concentration of reactant is 0.25 mol/L, it takes ________ s for the concentration to decrease to 0.20 mol/L.
 
  A) 2.1
  B) 1.4
  C) 1.0
  D) 0.47
  E) 0.20


Zack0mack0101@yahoo.com

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Reply #1 on: Aug 27, 2018
Answer to Question 1

B

Answer to Question 2

A


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