Explain what two-dimensional (2-D) and three-dimensional (3-D) models are. Give an example of one you've seen recently.

2D refers to the term “two-dimensional.”

3D refers to the term “three-dimensional.”

Explanation:

Circle, triangle, square, rectangle, and pentagon are some of the most common examples of 2D shapes.

Cylinder, pyramid, cube, and prism are some of the most common examples of 3D shapes.

the potential energy of the reactants is 200j.

from the energy diagram, the energy of the product formed is 350j; this means that, this reaction is an endothermic reaction, because it absorbs energy from its environment.