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Author Question: Consider the following measurement. 0.00153 Is the number above the arrow a significant digit? ... (Read 45 times)

mydiamond

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on: Jun 27, 2018
Consider the following measurement. 0.00153  Is the number above the arrow a significant digit?
 
  A) No, because it is an embedded zero.
  B) No, because it is a leading zero
  C) Yes, because it is a precise zero.
  D) Yes, because it is a trailing zero.

Question 2

Why is it more practical to measure the concentration of CO2 than that of H2CO3 when analyzing the blood buffering system?
 
  A) H2CO3 emits toxic fumes which makes it dangerous to work with regularly in the laboratory.
  B) In the blood, H2CO3 is bound to a carrier molecule that obscures its detection.
  C) The concentration of H2CO3 in the blood is negligibly small.
  D) Both A and C are correct.


raenoj

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

B

Answer to Question 2

C


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