Hydrochloric acid, chemical formula HCl. It is also called hydrochloric acid. We need to consider it from the point of view of the presence of oxygen in the composition. As we can see from the chemical formula, there is no oxygen in its composition, therefore it is without oxygen. Hydrochloric acid is not strong, it is found in the gastric juice of all mammals.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.