List and describe three examples of a chemical property

A combustion reaction involves oxygen and releases energy as heat. The heat that is released is what we refer to as the heat of combustion. When undergoing a combustion reaction with oxygen, different materials have different heats of combustion associated with them.

When a substance is formed from standard elements, heat is either released or absorbed. The heat associated with this is what we call the standard enthalpy of formation. This is an important characteristic because it tells us about the stability of the compound, as well as its reactivity with other compounds.

Toxicity is a very important chemical property because it tells us about the harm a substance can bring to other organisms. Some common toxic substances are mercury and various types of acids. This also includes household products, such as those containing ammonia.

Explanation:

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e

answer: they produce more slow than unicellular organisms.