Chemical Reactions FCJ 24

Front

What are reactants in a chemical equation?

Back

Reactants are the substances that undergo a chemical change in a reaction, found on the left side of a chemical equation.

Front

What do coefficients in a chemical equation represent?

Back

Coefficients are the big numbers in front of molecules that indicate how many molecules of each reactant or product are involved in the reaction.

Front

Is breaking glass a chemical or physical change?

Back

Breaking glass is a physical change because it does not alter the chemical composition of the glass.

Front

What is evidence of a chemical reaction?

Back

Evidence of a chemical reaction includes the formation of a new substance, such as color change, gas production, or precipitate formation.

Front

How many atoms are in a molecule of serotonin (C10H12N2O)?

Back

There are 25 atoms in a molecule of serotonin.

Front

What is a chemical equation?

Back

A chemical equation is a symbolic representation of a chemical reaction, showing the reactants and products.

Front

What is the difference between a chemical change and a physical change?

Back

A chemical change results in the formation of new substances, while a physical change does not alter the chemical composition.

Front

What are products in a chemical reaction?

Back

Products are the substances that are formed as a result of a chemical reaction, found on the right side of a chemical equation.

Front

What is a catalyst?

Back

A catalyst is a substance that speeds up a chemical reaction without being consumed in the process.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction; the total mass of reactants equals the total mass of products.