The heat absorbed can be calculate using the equation:
Covalent compounds have a low boiling point. All the other answers apply to ionic compounds.
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I believe the correct response is A. Wax which is made out of atoms that share electrons equally. Waxes being examples of lipids are primarily long chains of hydrocarbons consisting of carbon and hydrogen. And unlike polar and ionic substances, water molecules can not dissolve by attracting these fixed structures with equal electron densities to their respective partial charges.
It is sulfur, selenium, oxygen