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Author Question: The amount of iron on the earth today as compared to the amount of iron 120 years ago (approximately ... (Read 25 times)

Chelseaamend

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on: Aug 27, 2018
The amount of iron on the earth today as compared to the amount of iron 120 years ago (approximately the beginnings of the Industrial Revolution)
 
  A) is less.
  B) is essentially the same.
  C) is more.
  D) cannot be estimated or predicted.

Question 2

Glass can be colored because of the addition of ________ compounds to make a green color.
 
  A) magnesium
  B) chromium
  C) lithium
  D) zinc


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covalentbond

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

B

Answer to Question 2

B


Chelseaamend

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Reply #2 on: Aug 27, 2018
Thank you!


covalentbond

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Reply #3 on: Aug 27, 2018
Always glad to help...


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