2Ce(IO3)4(aq) + 24H2C2O4(aq)→Ce2(C2O4)3(aq) + 4I2(aq) + 42CO2(g) + 24H2O(l)

What would it look like if Argon gas is added.

rewrite the equation

There would be no change to the chemical equation if argon gas is added, as it is an inert gas and does not participate in chemical reactions. Therefore, the rewritten equation would be the same as the original:

2Ce(IO3)4(aq) + 24H2C2O4(aq) → Ce2(C2O4)3(aq) + 4I2(aq) + 42CO2(g) + 24H2O(l)