jermainedwards
15.07.2019 •
Chemistry
Which of the following statements is true?
a.
igneous rocks form from the cooling and crystallization of magma.
b.
fossils are frequently found in metamorphic rock.
c.
sedimentary rocks are formed as a direct result of chemical weathering.
d.
extrusive igneous rocks, found in the earth's lithosphere, are not subject to weathering.
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Ответ:
Igneous rocks form from the cooling and crystallization of magma.- A.
Ответ:
D. Oxidation
Explanation:
The oxidation state of a pure element is always equal to zero and the oxidation state for a pure ion is equivalent to its ionic charge.