Chemical Equations Flashcard

The Law of Conservation of Mass states that in a closed system, the total mass of reactants before a chemical reaction is equal to the total mass of products after the reaction.

The reactants are $$H_2 + O_2$$ .

The correct coefficient for oxygen is 3, resulting in $$4Fe + 3O_2 \rightarrow 2Fe_2O_3$$ .

The Law of Conservation of Matter states that the total amount of matter stays the same after it undergoes change.

The balanced equation is $$4Al + 3O_2 \rightarrow 2Al_2O_3$$ .

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

Coefficients are the numbers placed in front of the compounds in a chemical equation to indicate the number of molecules or moles of each substance.

A reactant is a substance that undergoes a chemical change in a reaction.

A product is a substance that is formed as a result of a chemical reaction.

Balancing chemical equations is important because it ensures that the Law of Conservation of Mass is obeyed, meaning the same number of atoms of each element is present on both sides of the equation.