Answer:
Sodium chloride is an ionic compound which makes it stronger and have a higher melting and boiling point. Candle wax is a covalent compound so it has a low melting point.
Explanation:
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Hydrogen bonds are strong intermolecular forces created when a hydrogen atom bonded to an electronegative atom approaches a nearby electronegative atom. Greater electronegativity of the hydrogen bond acceptor will lead to an increase in hydrogen-bond strength.
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A cold air mass moves into an area of warm air
Answer:
• Molecular mass of Iron (III) tetraoxide

[ molar masses: Fe → 56, O → 16 ]

Answer:
A. Frictional
Explanation:
Friction is the force created when two solid objects in contact try to move past each other.