CONSERVATION OF MASS AND BALANCING EQUATIONS

Front

What is the Law of Conservation of Mass?

Back

The Law of Conservation of Mass states that in a closed system, the mass of the reactants must equal the mass of the products in a chemical reaction. Mass cannot be created or destroyed.

Front

What happens to the mass of reactants during a chemical reaction?

Back

The mass of the reactants is conserved and equals the mass of the products.

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 a coefficient in a chemical equation?

Back

A coefficient is a number placed in front of a chemical formula in an equation to indicate how many molecules or moles of that substance are involved in the reaction.

Front

What is the balanced equation for the reaction of lithium and chlorine?

Back

Front

Back

Front

What is the significance of balancing chemical equations?

Back

Balancing chemical equations is important because it reflects the conservation of mass and ensures that the same number of atoms of each element are present before and after the reaction.

Front

What is the product of heating mercury(II) oxide (HgO)?

Back

Heating mercury(II) oxide (HgO) produces mercury (Hg) and oxygen gas (O_2).

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.

Front

What is the role of oxygen in the decomposition of HgO?

Back

Oxygen is produced as a gas during the decomposition of mercury(II) oxide (HgO) when it is heated.