Question

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

Explanation:

Step1: Balance K and Cl

Left side has 2 K (from \(2KClO_3\)) and 2 Cl. So KCl should have coefficient 2 to balance K and Cl: \(2KClO_3
ightarrow 2KCl + \_\_O_2\).

Step2: Balance O

Left side O: \(2\times3 = 6\) (from \(2KClO_3\)). Right side O is from \(O_2\), let coefficient be \(x\). So \(2x = 6 \Rightarrow x = 3\). Thus \(O_2\) has coefficient 3. The balanced equation is \(2KClO_3
ightarrow 2KCl + 3O_2\), so coefficients are 2, 3.

Answer:

a. 2, 3