Balancing Equations

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.

To determine the number of atoms in a chemical formula, look at the subscripts. For example, in C6H12O6, there are 6 carbon atoms, 12 hydrogen atoms, and 6 oxygen atoms.

Balancing a chemical equation means ensuring that the number of atoms of each element is the same on both sides of the equation, reflecting the conservation of mass.

A reactant is a substance that undergoes change during a chemical reaction. It is found on the left side of a chemical equation.

A product is a substance that is formed as a result of a chemical reaction. It is found on the right side of a chemical equation.

The balanced equation is SnO2 + 2H2 → Sn + 2H2O.

Coefficients indicate the number of molecules or moles of a substance involved in a reaction. They are used to balance the equation.

Yes, it is balanced because there are equal numbers of each type of atom on both sides of the equation.

The balanced equation is PCl5 + 4H2O → 5HCl + H3PO4.

Subscripts are numbers written below and to the right of an element symbol in a chemical formula, indicating the number of atoms of that element in a molecule.