Chem and Physical Science Final Review

Front

What are coefficients in a chemical equation?

Back

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

Front

How do you balance a chemical equation?

Back

To balance a chemical equation, adjust the coefficients of the reactants and products to ensure that the number of atoms of each element is the same on both sides of the equation.

Front

What is the formula for ammonium sulfide?

Back

(NH₄)₂S

Front

What is the formula for beryllium oxide?

Back

BeO

Front

What type of reaction is represented by P₄ + 3O₂ → 2P₂O₃?

Back

Synthesis reaction.

Front

What is a synthesis reaction?

Back

A synthesis reaction is a type of chemical reaction where two or more simple substances combine to form a more complex product.

Front

What is a decomposition reaction?

Back

A decomposition reaction is a type of chemical reaction where a single compound breaks down into two or more simpler products.

Front

What is a combustion reaction?

Back

A combustion reaction is a chemical reaction that occurs when a substance reacts with oxygen, releasing energy in the form of light or heat.

Front

What is the significance of the law of conservation of mass in chemical reactions?

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.

Front

What is the difference between a reactant and a product?

Back

A reactant is a substance that undergoes a chemical change in a reaction, while a product is a substance that is formed as a result of that reaction.