Question

1. consider the following combination reaction: sodium metal reacts with chlorine gas. identify the correctly balanced equation(s) for the reaction. select all that apply. na + cl₂→na₂cl₂, na + cl→nacl, cl₂ + na→nacl₂, na + cl₂→2nacl, 2na + cl₂→cl₂na, cl₂ + 2na→2nacl, na + cl₂→nacl₂, 2na + cl₂→2nacl

Explanation:

Step1: Recall chemical - equation balancing

In a chemical reaction, the number of atoms of each element on the reactant side must equal the number of atoms of the same element on the product side. Sodium ($Na$) reacts with chlorine gas ($Cl_2$). Chlorine gas is a diatomic molecule.

Step2: Balance the sodium and chlorine atoms

The un - balanced reaction is $Na+Cl_2
ightarrow NaCl$. There are 2 chlorine atoms on the reactant side and 1 chlorine atom on the product side. To balance the chlorine atoms, we put a coefficient of 2 in front of $NaCl$: $Na + Cl_2
ightarrow2NaCl$. Now, there are 2 sodium atoms on the product side, so we put a coefficient of 2 in front of $Na$ on the reactant side. The balanced equation is $2Na+Cl_2
ightarrow2NaCl$.

Answer:

$2Na + Cl_2
ightarrow2NaCl$