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Author Question: Igneous rock that formed on Earth's surface by solidification of lava is known as a. extrusive ... (Read 92 times)

urbanoutfitters

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on: Jul 28, 2018
Igneous rock that formed on Earth's surface by solidification of lava is known as
 a. extrusive rock.
  b. intrusive rock.
  c. metamorphic rock.
  d. silicate rock.

Question 2

The formula mass of Na2S is
 a. 55.1 u.
  b. 30.1 u.
  c. 78.1 u.
  d. 57.1 u.


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mcinincha279

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Reply #1 on: Jul 28, 2018
Answer to Question 1

a

Answer to Question 2

c


urbanoutfitters

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Reply #2 on: Jul 28, 2018
Thanks


mcinincha279

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Reply #3 on: Jul 28, 2018
Welcome :)


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