Use bond energies to determine the energy change for the following reaction: C2H4(g) + F2(g) → C2H4F2(g)

we can conclude that the melting point of table salt is above room temperature (it's actually 801 deg c). the melting point of mercury must be below room temperature (- 39 deg c).

cytokinesis is the splitting of a cell membrane to form 2 identical daughter cells. it's similar to mitosis as both cells have identical copies of dna and cytokinesis is a step in the mitotic cycle.

"record the time to complete a chemical reaction" would most likely be part of a lab procedure.