The answer is c :) i hope its the right answer
Physical change - No change of matter in this phase
chemical change - All types of phase change occur here
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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