Asolid compound in a sealed container was kept at a very low temperature in a freezer. when placed at room temperature, the substance quickly turned into a liquid. this compound is most likely which of the following?
a. an ionic compound because it has a low boiling point
b. a covalent compound because it has a low boiling point
c .an ionic compound because it has a low melting point
d. a covalent compound because it has a low melting point

Since this process involves a matter-state change from solid to liquid, melting is occurring.

Ionic compounds have very strong intermolecular 'bonds': this is because it is formed by a metal atom donating one or more electrons to a non-metal atom in order to result in complete valence shells, with the effect that opposite ions are formed (opposites attract). Hence a large input of energy is needed to overcome these 'bonds' and form a liquid from the giant solid ionic lattice - therefore ionic compounds have high melting and boiling points.

Conversely a covalent bond occurs between two non-metal atoms - unlike ionic compounds which form giant ionic structures, covalent bonds are used to form molecules. These only have weak intermolecular forces, which need a small energy input to overcome: therefore the melting and boiling points will be much lower.

Considering that the compound has been taken from the freezer, which is 0 degrees celcius or lower, the state change has occurred at a low temperature. This makes it extremely likely that the compound is covalent.

In conclusion, the correct answer is d.

Ithink that the use of creativity in the sciences entails that one produce something out of nothing or from another thing. with this, i think that the he wrote down his results as four parts of the atomic theory is the manifestation of the  creativity of john dalton.