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Questions and Answers
What are the four main branches of chemistry and their respective focuses?
What are the four main branches of chemistry and their respective focuses?
The four main branches of chemistry are organic chemistry (study of carbon compounds), inorganic chemistry (study of non-carbon compounds), physical chemistry (study of the properties and behavior of matter), and analytical chemistry (study of identifying and quantifying chemical substances).
Explain the concept of a chemical reaction and provide an example.
Explain the concept of a chemical reaction and provide an example.
A chemical reaction is a process in which one or more substances are transformed into new substances with different properties. For example, the reaction between hydrogen and oxygen to form water (2H2 + O2 -> 2H2O) is a chemical reaction.
What is the difference between a physical change and a chemical change?
What is the difference between a physical change and a chemical change?
A physical change is a change in the physical properties of a substance without a change in its chemical composition, such as melting ice or boiling water. A chemical change, on the other hand, involves a rearrangement of atoms or molecules to form new substances, such as burning wood or rusting iron.
