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Author Question: Coal can be cleaned before it is burned. The flotation method separates coal from its major ... (Read 137 times)

cdr_15

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on: Aug 27, 2018
Coal can be cleaned before it is burned. The flotation method separates coal from its major impurities by taking advantage of the difference in ________ of these materials.
 
  A) acidity
  B) combustion
  C) density
  D) volatility

Question 2

Atoms that have the same atomic number but different numbers of neutrons are
 
  A) radioactive.
  B) isotopes.
  C) impossible.
  D) ions.


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essyface1

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

C

Answer to Question 2

B


cdr_15

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Reply #2 on: Aug 27, 2018
Thanks


essyface1

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Reply #3 on: Aug 27, 2018
Welcome :)


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