Which statements correctly describe chemical reactions? Select all that apply.

The statements that correctly describe chemical reactions are

A. If the reactants include 5 atoms of Fe, then the products must include 5 atoms of Fe.

C. If the reactants include an aluminum atom, then the products must include an aluminum atom.

E. If there are a total of 15 atoms in the reactants, there must be a total of 15 atoms in the product.

Explanation:

In a chemical reaction, reactants are the elements or compounds that react to give a particular product(s). The reactants are the substances that start the chemical reaction and they are found at the left hand side of the chemical equation. While the products are found at the right hand side of the chemical equation and they are seen at the end of the reaction.

In chemical reaction, the number of atoms that starts the reaction remains the same. That is the same number of atoms is seen in the products. This follows the law of conservation of matter - which postulates that matter cannot be created or destroyed.

But in a chemical reaction, number of molecules are not conserved.

can you attach the

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.