(balance each equation) na + mgf2 naf + mg

2Na + MgF₂   → 2NaF  + Mg

Explanation:

Chemical equation:

Na + MgF₂   →  NaF  + Mg

Chemical equation:

2Na + MgF₂   → 2NaF  + Mg

The given reaction follow the law of conservation of mass because there are equal number of atoms of sodium, magnesium and fluorine are present on both side of equation.

According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.

This law was given by french chemist  Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.

Type of reaction:

The given chemical reaction is type of single replacement reaction. Sodium replace the magnesium and form sodium fluoride.

Single replacement:

It is the reaction in which one elements replace the other element in compound.

AB + C → AC + B

one state would change   like louisiana to texas. thats a change

explanation:

the answer to this question is 3.