[Answered] Igneous rock that formed on Earth's surface by solidification of lava is known as a. extrusive ...

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urbanoutfitters

Hero Member
Posts: 530

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

Sr. Member
Posts: 316

Reply #1 on: Jul 28, 2018

Answer to Question 1

a

Answer to Question 2

c

urbanoutfitters

Hero Member
Posts: 530

Reply #2 on: Jul 28, 2018

Thanks

mcinincha279

Sr. Member
Posts: 316

Reply #3 on: Jul 28, 2018

Welcome

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