Are the molecular sizes and composition of different substances the same? Explain the answer with your examples.

The molecules of different substances are different, for example, a carbon dioxide molecule consists of a carbon atom and two oxygen atoms, and an alcohol molecule consists of two carbon atoms, six hydrogen atoms and one oxygen atom.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.