| 5) As the amount of carbon-14 in a dead : organism decays and decreases, what happens
to the amount of carbon-12?

Temperature and pressure

Heat is involved in chemical change in two ways; chemical changes either result in heat being added to or removed from an object, and chemical changes require a certain amount of heat before they can take place.

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.

Pretty sure it's d. heterogeneous is separated by physical properties.