B. released, forming bonds usually releases energy.
Answer:
Physical Change
Explanation:
The bush is changing shapes, not changing what it is.
I think its A. it cant be C or D b/c we are measuring the distance between Earth and Saturn, not the speed.
Answer:

Explanation:
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In this case, according to the given information it turns out possible for us to realize that one mole of the given compound, Mg(ClO₄)₂, has one mole of Mg, two moles of Cl and eight moles of O; thus, we proceed as follows:

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