The density of oil is 0.93 g/mL or 0.93 g/cm3. Based off of what you now know about the density of the rock and block, predict whether these objects would float or sink in oil.
Explain your prediction.

Rock:

Block:

Answerδh > 0explanationc₆h₆  (s)  → c₆h₆ (l)if you are changing it from a solid to a liquid, you are pretty much melting the solid. this requires heat energy. therefore, the reaction is endothermic (takes in energy); the system enthalpy increases as the reaction proceeds: δh > 0.

In any atom of any element, you will find protons and neutrons in the nucleus of any atom 

"electrical energy" transforms to "thermal energy".hope my answer has you : )