Question

what is the missing coefficient to make a balanced equation? 4na + ?o₂ → na₂o 4 3 1 2

Explanation:

Step1: Count sodium atoms

On the left - hand side, we have 4 Na atoms. In $Na_2O$, to balance the sodium atoms, the coefficient of $Na_2O$ must be 2 since $2\times2 = 4$ sodium atoms.

Step2: Count oxygen atoms

We now have 2 oxygen atoms in 2$Na_2O$. On the left - hand side, oxygen is in the form of $O_2$. To get 2 oxygen atoms from $O_2$, the coefficient of $O_2$ must be 1 because 1 molecule of $O_2$ has 2 oxygen atoms.

Answer:

1