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Bond [772]
3 years ago
6

Metamorphic rocks used to be igneous and sedimentary rocks. They were changed into metamorphic rocks by

Biology
2 answers:
Daniel [21]3 years ago
7 0
The answer is d because of heat and pressure
Flura [38]3 years ago
3 0

Answer:

b

Explanation:

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HURRY PLSSSS. which is one way surface water may become groundwater
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2 years ago
A bond of the following elements would be of what type? Ca + 2Cl<br><br> Covalent or ionic
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Answer:

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Explanation:

Ionic bond:

It is the bond which is formed by the transfer of electron from one atom to the atom of another element.  

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There are two valance electrons in calcium so it needed to lose two valance electrons to complete the octet while chlorine needed one electron to complete the octet. Thus two electrons lost by one calcium atom are gained by two atoms of chlorine.

Ca + Cl₂ → CaCl₂

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What is released through nuclear fusion in stars?
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