how do you and write a combination of reaction equations?

Sodium metal reacts with chlorine gas?
Na(s) + Cl(subscript)2(g)---______?

balance*

You omitted a word in your post but the reaction is

2Na(s) + Cl2(g) ==> 2NaCl(s) at room temperature.

To write the balanced chemical equation for the reaction between sodium metal and chlorine gas, you need to consider the type of reaction that occurs. In this case, it is a single displacement or redox reaction.

1. Start by writing the chemical formulas of reactants on the left side of the equation:
Na(s) + Cl₂(g)

2. Identify the charge of each element. Sodium (Na) has a charge of +1, and chlorine (Cl) has a charge of 0 since it exists as a diatomic molecule.

3. Determine the products formed by the reaction. In this case, sodium loses an electron and chlorine gains an electron, forming sodium ions (Na⁺) and chloride ions (Cl⁻).

4. Write the equation by balancing the number of atoms and charges on both sides:
2Na(s) + Cl₂(g) → 2Na⁺(aq) + 2Cl⁻(aq)

This equation represents the combination of reaction equations between sodium metal and chlorine gas. It shows that two sodium atoms react with one molecule of chlorine gas to produce two sodium ions and two chloride ions. The equation is balanced with respect to both atoms and charges.