Question

which group of coefficients balances the following chemical equation?
2kclo₃ → —— kcl + —— o₂
a 2, 2
b 1, 1
c 2, 3

Explanation:

Step1: Balance K and Cl atoms

In \(2KClO_3\), there are 2 K and 2 Cl atoms. So for KCl, the coefficient \(a = 2\) (to balance K and Cl: \(2KClO_3
ightarrow2KCl+\) __ \(O_2\))

Step2: Balance O atoms

In \(2KClO_3\), there are \(2\times3 = 6\) O atoms. In \(O_2\), if the coefficient is \(c\), then \(2c=6\), so \(c = 3\) (\(2KClO_3
ightarrow2KCl + 3O_2\))

Answer:

a = 2, c = 3. So the correct group of coefficients is when \(a = 2\) and \(c=3\) (assuming the option with \(a = 2\) and \(c = 3\) is present among the choices. If we consider the given options (though the full option - label mapping is not clear from the image but based on calculation): if option c has \(a = 2\) and \(c=3\) (assuming the format of options as \(a,b,c\) where \(b\) is for KCl (already balanced as 2 when \(a = 2\)) then that is the answer.