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Author Question: Which of the following gases was present in the smallest amounts in early atmosphere of the Earth? ... (Read 78 times)

sdfghj

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  • Posts: 552
on: Jul 27, 2018
Which of the following gases was present in the smallest amounts in early atmosphere of the Earth?
 
  A) hydrogen (H2)
  B) nitrogen (N2)
  C) carbon dioxide (CO2)
  D) oxygen (O2)

Question 2

The rear-view mirrors on the passenger side of many new cars have a warning written on them: OBJECTS IN MIRROR ARE CLOSER THAN THEY APPEAR. This implies that the mirror must be
 
  A) concave.
  B) plane.
  C) convex.
  D) transparent.


dominiqueenicolee

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

D

Answer to Question 2

C


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