Hydrogen is a
covalent bond. (A bond where one or more pairs of electrons are shared by two atoms)
The liquid nitrogen freezes the balloon and shatters it on contact
It is c I hope I helped out with this question!.
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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