PS1-2 Matter Lesson 7 Flashcard Review

Front

What is a reactant?

Back

A substance before a chemical reaction takes place.

Front

What is a product in a chemical reaction?

Back

A substance created during/from a chemical reaction.

Front

What is a chemical equation?

Back

A representation of a chemical reaction using symbols and formulas.

Front

What does the arrow in a chemical equation represent?

Back

The direction of the reaction, indicating reactants turning into products.

Front

What is a synthesis reaction?

Back

A reaction where two or more substances combine to form a single product.

Front

What is a decomposition reaction?

Back

A reaction where a single compound breaks down into two or more simpler substances.

Front

What is a replacement reaction?

Back

A reaction where one element replaces another in a compound.

Front

What are coefficients in a chemical equation?

Back

Numbers placed before compounds to indicate the number of molecules involved.

Front

What is the law of conservation of mass?

Back

Matter cannot be created or destroyed in a chemical reaction.

Front

What are the reactants in the equation CH4 + O2 → CO2 + H2O?

Back

CH4 and O2.