Hydrogen peroxide is widely used as an oxidizing agent.

He is an expert in chemistry.

He received the letter challenging him to a duel and began preparing for the duel.

He won a majority of the votes in the election.

Basic oxides react with acids to produce salt and water.

Gender roles are an important element in defining individual behavior in society.

His role is to fulfill his responsibilities as a leader.

It is important to understand the importance of health.

There are a lot of old furniture in the storage room.

His travel story was very interesting.