Balancing chemical equations, balancing chemical equations

balanced

__CaO + __H₂O → __Ca(OH)₂

2, 1, 2

__Na + __F₂ → __NaF

2, 1, 2, 1

__Na + __MgF₂ → __NaF + __Mg

1, 1, 2, 1

__BaCl₂ + __Na₂SO₄ → __NaCl + __BaSO₄

1, 2, 1, 1

__Sn + __HF → __SnF₂ + __H₂

4, 3, 2

__Fe +__O₂ → __Fe₂O₃

1, 3, 1, 2

__CS₂ + __O₂ → __CO₂ + __SO₂

2, 3, 2, 2

__MgS + __O₂ → __MgO + __SO₂

1,2,1,2

Complete combustion of methane gas.

__CH₄ + __O₂ → __CO₂ + __H₂O

reactant

A chemical substance that is present at the start of a chemical reaction.

product

A chemical substance formed as a result of a chemical reaction

chemical equation

A representation of a chemical reaction that uses symbols to show the relationship between the reactants and the products

chemical reaction

A process during which chemical bonds between atoms are broken and new ones are formed. Producing one or more different substances.

law of conservation of mass

During any chemical reaction, the mass of the products is always equal to the mass of the reactants

coefficient

A number in front of a chemical formula in an equation that indicates how many molecules or atoms of each reactant and product are involved in a reaction.

subscript

A number written slightly below and to the right of a chemical symbol that shows how many atoms of an element are in a compound.

balancing chemical equations

keep mass of products and reactants the same by adjusting coefficients as necessary