Use bond energies and the fact that the heats of formation of OF2 and OCl2 are 24.7 and 80.37 kJ/mol, respectively to determine the O-F and O-Cl bond energies. DO-F = kJ/mol DO-Cl = kJ/mol

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.

the answer is d.) potassium

one negative thing it that it can kill water animals. another negative thing is it can cause the destruction of ecosystem. one way water pollution can be reduced is to conserve energy.