Because substances are made up of different atoms and molecules, they react in characteristic ways. Production of a gas, color changes, a change in temperature, and the formation of a precipitate are ...

Chemical reactions make new chemicals. Atoms are rearranged during a chemical reaction, but the number of atoms does not change. Evidence of chemical reactions includes a large temperature change ...

An overview of the definitions of different types of chemicals ... ways to distinguish physical and chemical changes. Chemical equations and calculations Reaction information is shown using ...

The yeast contains an enzyme called catalase, which breaks down the hydrogen peroxide into water and oxygen gas. The oxygen ...

This happens through two different types of chemical reactions. The reaction when the cathode gains electrons is called reduction. The reaction when the anode loses electrons is called oxidation.

Heterogeneous catalysts speed up chemical reactions by being in a different state than the reactants. They are efficient and ...

Proteins serve as structural support inside the cell and they perform many vital chemical reactions. Each protein is a molecule made up of different combinations of 20 types of smaller ...