Question

Leann is learning about chemical reactions. She wants to create a model of a chemical reaction, so she is examming the information that she should include. What are the different componets that she should include in her model? A the kinds of atoms that form during reaction B the kinds of molecules involved in the reaction C the kinds of elements that make up a molecule D whether the molecules are products or reactants E whether the products have more mass than the reactants choose three that apply

Answer 1

In modeling a chemical reaction, Leann should include (B) the molecules involved, (C) the elements that constitute these molecules, and (D) identify which molecules are reactants and which are products. The law of conservation of mass ensures that the mass of the reactants equals that of the products, thus the mass should not be depicted as changing.

Step-by-step explanation:

When creating a model of a chemical reaction, Leann should include several components to ensure an accurate and comprehensive representation of the reaction process. Three components that apply include:

• The kinds of molecules involved in the reaction: Leann should depict both the reactants and products as molecules to illustrate the substances involved at the start and end of the chemical reaction.
• The kinds of elements that make up a molecule: Knowing which elements form each molecule will help us understand how atoms reorganize during the chemical reaction to create new substances.
• Whether the molecules are products or reactants: This distinction is crucial as it defines the direction of the chemical reaction, illustrated by an arrow in chemical equations from reactants to products.

Note that whether the products have more mass than the reactants is not a component to include, as the law of conservation of mass dictates that the mass of the reactants equals the mass of the products in a closed system. In a well-designed model, the types of atoms (elements) and the number of these atoms should remain consistent from reactants to products, confirming no loss or gain in mass.

Answer 2

• B the kinds of molecules involved in the reaction
• C the kinds of elements that make up a molecule
• D whether the molecules are products or reactants

Step-by-step explanation:

When modelling the chemical reaction, it is important that the process is explained such that people looking at the model understand what happened in terms of the reactants and products and how they came to be either.

Leann will therefore have to include the kinds of molecules involved in the reaction be they products or reactants. She will also have to include which elements make up the molecules for instance a water molecule would have the elements Hydrogen and Oxygen.

Finally she would have to indicate which molecules are reactant and which are products. Reactants usually stay to the left side of the reaction equation and products stay to the right.