Look up the boiling points and relative molecular masses of water, hexane, and ethanol. Try to explain the relative magnitudes of their boiling points in terms of polarity.

I know that ethanol and water are polar and that hexane is non-polar. Also, 6)

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To determine the boiling points and relative molecular masses of water, hexane, and ethanol, you can start by searching for their chemical formulas.

The chemical formula for water is H2O. The boiling point of water is 100 degrees Celsius, and its relative molecular mass is 18.015 g/mol.

The chemical formula for hexane is C6H14. The boiling point of hexane is 69 degrees Celsius, and its relative molecular mass is 86.18 g/mol.

The chemical formula for ethanol is C2H5OH. The boiling point of ethanol is 78.37 degrees Celsius, and its relative molecular mass is 46.07 g/mol.

Now, let's discuss the relative magnitudes of their boiling points in terms of polarity. Polarity refers to the distribution of electrons within a molecule. Water and ethanol are polar molecules because they contain electronegative atoms (oxygen and oxygen and carbon-oxygen bond, respectively) that create partial positive and partial negative charges within the molecule.

Hexane, on the other hand, is a non-polar molecule because it consists only of carbon and hydrogen atoms, which have similar electronegativities.

In general, polar molecules have stronger intermolecular forces, such as hydrogen bonding or dipole-dipole interactions, compared to non-polar molecules. These intermolecular forces require more energy to break, resulting in higher boiling points.

Therefore, water and ethanol, being polar molecules, have higher boiling points than hexane, which is a non-polar molecule. Water, being the most polar among the three, has the highest boiling point, followed by ethanol, and then hexane.