Ionic molecules have higher boiling point than covalent molecules.
So that leaves Na2SO4 and NaCl.
The ionic molecule with higher charge will have higher boiling point.
Na2SO4 have ions with charge +-2.
NaCl have ions with charge +-1.
So the answer is C.
True. Because they are white we know that they reflect light, and thus heat.
Explanation:
a ...15 seconds×(3600 seconds hour)
The wick and the wax
Sorry if that was useless, I'm not sure how generalized you were being
Gases in which the molecules that make it up naturally consist of two atoms of the same type.