Question

what is the missing coefficient to make a balanced equation? 2kclo₃ → ?kcl + o₂ 1 3 2 4

Explanation:

Step1: Balance potassium and chlorine atoms

On the left - hand side, we have 2 potassium (K) and 2 chlorine (Cl) atoms from \(2KClO_3\). For the right - hand side, in \(KCl\), to balance the K and Cl atoms, the coefficient of \(KCl\) must be 2.

Step2: Balance oxygen atoms

On the left - hand side, we have \(2\times3 = 6\) oxygen atoms from \(2KClO_3\). On the right - hand side, in \(O_2\), if the coefficient of \(O_2\) is 3 (\(3O_2\)), we have \(3\times2=6\) oxygen atoms. But we are only asked for the coefficient of \(KCl\).

Answer:

2